https://billpetro.com/blog/ https://billpetro.com/history-of-i-have-a-dream-martin-luther-king-jr-57-years-ago/ 2026-08-28T08:30:03-06:00 https://billpetro.com/history-of-star-trek/ 2026-08-26T18:06:18-06:00 https://billpetro.com/history-of-st-augustine/ 2026-08-28T01:30:49-06:00 https://billpetro.com/history-of-gold-rush/ 2026-08-19T13:17:29-06:00 https://billpetro.com/london-in-a-day-part-6-food-and-dining/ 2026-08-18T15:01:38-06:00 https://billpetro.com/london-in-a-day-part-3-cathedrals/ 2026-08-18T14:34:38-06:00 https://billpetro.com/london-in-a-day-part-2-museums/ 2026-08-18T14:30:20-06:00 https://billpetro.com/london-in-a-day-part-1-introduction/ 2026-08-18T14:16:41-06:00 https://billpetro.com/history-of-infinity-day-august-8/ 2026-08-08T14:00:00-06:00 https://billpetro.com/movie-review-the-odyssey/ 2026-07-29T17:08:37-06:00 https://billpetro.com/science-of-the-buck-moon/ 2026-07-29T01:30:27-06:00 https://billpetro.com/history-of-august/ 2026-08-01T01:35:53-06:00 https://billpetro.com/history-of-christmas-in-july/ 2026-07-25T07:38:03-06:00 https://billpetro.com/history-of-st-james-day-camino-de-santiago/ 2026-07-24T01:30:23-06:00 https://billpetro.com/history-of-1st-moon-landing-apollo-11/ 2026-07-20T14:14:14-06:00 https://billpetro.com/history-bastille-day/ 2026-07-14T01:30:31-06:00 https://billpetro.com/history-of-independence-day-6/ 2026-07-04T14:42:18-06:00 https://billpetro.com/history-of-the-4th-of-july-john-adams/ 2026-07-04T14:41:53-06:00 https://billpetro.com/history-of-alexander-hamilton/ 2026-07-04T14:41:31-06:00 https://billpetro.com/st-john-the-baptist/ 2026-06-24T07:40:37-06:00 https://billpetro.com/interview-whats-the-history-behind-valentines-day/ 2026-06-23T09:31:15-06:00 https://billpetro.com/history-flag-day/ 2026-06-12T09:46:26-06:00 https://billpetro.com/movie-review-pressure/ 2026-06-01T18:47:23-06:00 https://billpetro.com/history-of-towel-day/ 2026-05-25T10:30:17-06:00 https://billpetro.com/concert-review-stevie-wonder-at-coors-amphitheater-in-denver/ 2026-05-13T09:34:40-06:00 https://billpetro.com/movie-review-a-great-awakening-the-history-behind-the-movie/ 2026-05-11T20:15:16-06:00 https://billpetro.com/history-of-jonathan-edwards/ 2026-05-11T13:35:15-06:00 https://billpetro.com/the-who-tommy/ 2026-05-23T01:30:17-06:00 https://billpetro.com/history-of-garden-of-the-gods/ 2026-05-06T11:54:11-06:00 https://billpetro.com/history-of-the-liberation-of-dachau-april-29-1945-part-3/ 2026-04-30T01:30:28-06:00 https://billpetro.com/history-of-the-liberation-of-dachau-a-personal-view/ 2026-04-27T17:33:33-06:00 https://billpetro.com/history-of-the-founding-of-rome/ 2026-04-21T09:08:29-06:00 https://billpetro.com/history-of-holocaust-remembrance-day/ 2026-04-14T12:34:01-06:00 https://billpetro.com/history-of-easter-candy/ 2026-04-04T19:14:40-06:00 https://billpetro.com/holy-week/ 2026-04-03T11:54:20-06:00 https://billpetro.com/history-of-christmas-why-do-we-celebrate-it-on-december-25-2/ 2026-03-25T17:11:16-06:00 https://billpetro.com/history-of-michaelmas/ 2026-03-25T17:09:57-06:00 https://billpetro.com/history-of-christmas-advent/ 2026-03-25T17:09:28-06:00 https://billpetro.com/history-of-annunciation-day/ 2026-03-25T14:40:25-06:00 https://billpetro.com/history-of-the-moon-landing/ 2026-03-21T15:38:56-06:00 https://billpetro.com/future-of-the-moon/ 2026-03-21T15:37:39-06:00 https://billpetro.com/science-of-the-strawberry-moon/ 2026-03-21T15:36:11-06:00 https://billpetro.com/history-of-blue-moon/ 2026-03-21T15:35:57-06:00 https://billpetro.com/science-of-harvest-blood-supermoon/ 2026-03-21T15:34:38-06:00 https://billpetro.com/science-of-the-harvest-supermoon/ 2026-03-21T15:34:16-06:00 https://billpetro.com/movie-review-dune/ 2026-03-21T13:54:11-06:00 https://billpetro.com/history-of-friday-the-13th/ 2026-03-13T10:23:46-06:00 https://billpetro.com/history-of-the-40-martyrs-of-sebaste/ 2026-03-10T12:22:53-06:00 https://billpetro.com/history-of-starkbier-festival/ 2026-03-06T11:57:02-07:00 https://billpetro.com/history-daylight-saving-time-starting/ 2026-03-06T11:48:55-07:00 https://billpetro.com/history-of-woman-suffrage-procession/ 2026-03-03T09:46:49-07:00 https://billpetro.com/history-of-the-first-american-christmas-1776/ 2026-02-23T07:08:12-07:00 https://billpetro.com/history-david-winn/ 2026-02-11T17:37:55-07:00 https://billpetro.com/history-of-general-winn-the-passing-of-a-hero/ 2026-02-11T17:29:27-07:00 https://billpetro.com/history-of-the-olympics/ 2026-02-06T17:08:48-07:00 https://billpetro.com/history-of-the-winter-olympics/ 2026-02-06T16:47:45-07:00 https://billpetro.com/history-of-groundhog-day/ 2026-02-02T12:22:23-07:00 https://billpetro.com/history-of-james-madison/ 2026-01-30T15:07:04-07:00 https://billpetro.com/history-of-hamilton-the-musical/ 2026-01-30T13:24:25-07:00 https://billpetro.com/history-of-mozart/ 2026-01-27T15:26:46-07:00 https://billpetro.com/godfather/ 2026-01-14T15:50:25-07:00 https://billpetro.com/history-of-plough-monday-start-of-the-agricultural-year/ 2026-01-12T10:18:57-07:00 https://billpetro.com/history-of-distaff-day-back-to-work/ 2026-01-09T15:23:19-07:00 https://billpetro.com/history-of-jubilee-year-the-holy-year-in-rome/ 2026-01-07T08:22:23-07:00 https://billpetro.com/history-of-pilgrimages-all-roads-lead-to-rome/ 2025-12-31T09:45:15-07:00 https://billpetro.com/history-of-new-years-eve/ 2025-12-31T09:01:03-07:00 https://billpetro.com/my-top-5-articles-of-2025/ 2025-12-30T14:23:15-07:00 https://billpetro.com/concert-review-paul-mccartney-at-coors-field-denver/ 2025-12-30T14:22:46-07:00 https://billpetro.com/history-of-hedy-lamarr/ 2025-12-30T14:21:25-07:00 https://billpetro.com/history-of-fruitcake/ 2025-12-29T12:21:16-07:00 https://billpetro.com/history-of-auld-lang-syne/ 2025-12-30T01:30:59-07:00 https://billpetro.com/die-hard-a-christmas-movie/ 2025-12-17T16:05:11-07:00 https://billpetro.com/history-of-christmas-tree/ 2025-12-10T12:44:03-07:00 https://billpetro.com/history-of-carol-of-the-bells/ 2025-12-08T11:29:32-07:00 https://billpetro.com/history-of-martin-luther-part-8-legacy/ 2025-11-08T12:00:41-07:00 https://billpetro.com/history-of-guy-fawkes-night/ 2025-11-04T08:34:12-07:00 https://billpetro.com/history-of-all-saints-day/ 2025-10-30T01:30:55-06:00 https://billpetro.com/history-of-halloween/ 2025-10-29T01:30:29-06:00 https://billpetro.com/history-of-erasing-unpopular-leaders-damnatio-memoriae/ 2025-10-21T16:55:06-06:00 https://billpetro.com/history-of-the-left-vs-the-right/ 2025-10-18T06:05:54-06:00 https://billpetro.com/history-of-waltz-day-123123/ 2025-10-15T12:52:32-06:00 https://billpetro.com/history-of-october-10/ 2025-10-13T12:05:55-06:00 https://billpetro.com/concert-review-paul-mccartney-at-pepsi-center-in-denver/ 2025-10-13T08:10:59-06:00 https://billpetro.com/history-of-sukkot-festival-of-booths/ 2025-10-06T16:21:43-06:00 https://billpetro.com/history-of-coffee-international-coffee-day/ 2025-09-30T00:30:39-06:00 https://billpetro.com/history-of-the-fall-what-is-the-autumnal-equinox/ 2025-09-22T08:27:24-06:00 https://billpetro.com/history-of-the-natural-a-father-returns/ 2025-09-18T19:38:46-06:00 https://billpetro.com/history-of-september-21-earth-wind-fire/ 2025-09-20T01:30:18-06:00 https://billpetro.com/history-of-patriot-day-9-11/ 2025-09-11T11:46:49-06:00 https://billpetro.com/history-of-the-ibm-pc-30-years-ago/ 2025-08-12T09:47:00-06:00 https://billpetro.com/history-of-presidents-opposing-supreme-court-separation-of-powers/ 2025-08-04T17:23:13-06:00 https://billpetro.com/movie-review-superman-no-plot-spoilers/ 2025-07-11T10:40:00-06:00 https://billpetro.com/science-of-the-dog-days-of-summer/ 2025-07-03T12:52:22-06:00 https://billpetro.com/history-canada-day/ 2025-07-01T08:30:18-06:00 https://billpetro.com/history-of-presidential-inaugurations/ 2025-06-12T18:55:08-06:00 https://billpetro.com/history-of-the-conclave-how-a-new-pope-is-elected/ 2025-05-07T04:57:06-06:00 https://billpetro.com/history-of-ascension-day/ 2025-05-29T01:30:58-06:00 https://billpetro.com/martin-luther-part-5-kidnapped/ 2025-04-25T13:47:58-06:00 https://billpetro.com/historical-climate-of-easter-2/ 2025-04-01T13:16:40-06:00 https://billpetro.com/historical-climate-of-easter-3/ 2025-04-01T13:16:26-06:00 https://billpetro.com/historical-climate-of-easter-4/ 2025-04-01T13:16:12-06:00 https://billpetro.com/theatre-review-the-philadelphia-story-at-the-old-vic-in-london-2/ 2025-02-13T09:35:29-07:00 https://billpetro.com/obama-inauguration-info-extravaganza/ 2025-01-17T15:58:10-07:00 https://billpetro.com/history-of-new-years-day-why-on-january-1/ 2024-12-29T20:19:10-07:00 https://billpetro.com/my-top-5-articles-of-2024/ 2024-12-29T09:03:43-07:00 https://billpetro.com/history-of-the-twelve-days-of-christmas/ 2024-12-27T17:54:26-07:00 https://billpetro.com/history-of-christmas-the-wise-men/ 2024-12-21T05:11:05-07:00 https://billpetro.com/history-of-christmas-the-wise-men-2/ 2024-12-21T05:10:54-07:00 https://billpetro.com/history-of-christmas-the-wise-men-3/ 2024-12-21T05:10:42-07:00 https://billpetro.com/history-of-the-wise-men-the-magi/ 2024-12-21T05:09:10-07:00 https://billpetro.com/science-of-the-solstice-2/ 2024-12-20T11:08:43-07:00 https://billpetro.com/science-of-the-solstice-3/ 2024-12-20T11:08:14-07:00 https://billpetro.com/science-of-the-solstice-4/ 2024-12-20T11:07:21-07:00 https://billpetro.com/history-of-christmas-king-herod/ 2024-12-16T09:12:49-07:00 https://billpetro.com/history-of-christmas-king-herod-2/ 2024-12-16T09:12:20-07:00 https://billpetro.com/history-of-christmas-king-herod-3/ 2024-12-16T09:12:10-07:00 https://billpetro.com/history-of-christmas-king-herod-the-great/ 2024-12-16T09:12:01-07:00 https://billpetro.com/history-of-christmas-king-herod-the-great-2/ 2024-12-16T09:11:46-07:00 https://billpetro.com/interview-why-care-about-church-history/ 2024-12-09T07:20:22-07:00 https://billpetro.com/announcing-my-new-podcast/ 2024-12-06T14:11:19-07:00 https://billpetro.com/the-history-of-faith-in-a-time-of-plague/ 2024-12-06T11:13:08-07:00 https://billpetro.com/history-of-the-christmas-creche/ 2024-12-04T15:51:57-07:00 https://billpetro.com/history-of-the-christmas-creche-the-manger-scene/ 2024-12-04T15:51:40-07:00 https://billpetro.com/abraham-lincolns-thanksgiving-proclamation-1863/ 2024-11-27T08:25:50-07:00 https://billpetro.com/history-of-black-friday-2/ 2024-11-26T13:12:33-07:00 https://billpetro.com/george-washingtons-thanksgiving-proclamation-1789/ 2024-11-26T09:53:40-07:00 https://billpetro.com/history-of-the-first-thanksgiving-proclamation/ 2024-11-25T08:13:35-07:00 https://billpetro.com/history-of-sadie-hawkins-day/ 2024-11-19T13:18:12-07:00 https://billpetro.com/veterans-day-how-it-differs-from-memorial-day/ 2024-11-11T07:36:11-07:00 https://billpetro.com/history-of-election-day-why-we-vote-on-a-tuesday-in-november/ 2024-11-04T13:31:09-07:00 https://billpetro.com/history-of-star-trek-3/ 2024-08-27T16:51:10-06:00 https://billpetro.com/history-of-the-democratic-national-convention/ 2024-08-19T09:37:38-06:00 https://billpetro.com/concert-review-the-beach-boys-endless-summer-gold/ 2024-08-17T23:10:22-06:00 https://billpetro.com/history-of-the-beach-boys/ 2024-08-17T16:15:39-06:00 https://billpetro.com/history-of-labor-day-3/ 2024-08-15T09:17:40-06:00 https://billpetro.com/publishing-on-substack-again-and-on-medium/ 2024-08-14T10:41:37-06:00 https://billpetro.com/concert-review-1964-beatles-tribute-at-red-rocks-in-denver/ 2024-08-08T16:01:11-06:00 https://billpetro.com/movie-review-deadpool-and-wolverine-no-plot-spoilers/ 2024-07-26T14:42:24-06:00 https://billpetro.com/movie-review-x-men-origins-wolverine/ 2024-07-26T14:42:18-06:00 https://billpetro.com/history-of-reek-sunday/ 2024-07-21T09:02:33-06:00 https://billpetro.com/history-of-presidential-assassinations/ 2024-07-19T12:41:55-06:00 https://billpetro.com/an-interview-with-bill-petro/ 2024-07-17T10:47:06-06:00 https://billpetro.com/history-of-scotty/ 2024-07-12T14:43:41-06:00 https://billpetro.com/history-of-july-2-2/ 2024-06-29T17:52:51-06:00 https://billpetro.com/history-of-benjamin-franklin/ 2024-06-29T15:23:59-06:00 https://billpetro.com/history-of-the-4th-of-july-thomas-jefferson-3/ 2024-06-27T09:30:14-06:00 https://billpetro.com/history-of-the-4th-of-july-thomas-jefferson-2/ 2024-06-27T09:28:48-06:00 https://billpetro.com/history-martin-luther-500-years-ago/ 2024-06-24T17:58:20-06:00 https://billpetro.com/history-of-memorial-day-why-we-fight-2/ 2024-05-24T21:10:53-06:00 https://billpetro.com/history-of-memorial-day-why-we-fight-3/ 2024-05-24T21:10:13-06:00 https://billpetro.com/memorial-day-why-we-fight-2/ 2024-05-24T21:09:24-06:00 https://billpetro.com/obsidian-and-ai/ 2024-04-16T08:28:26-06:00 https://billpetro.com/history-of-amazing-grace-part-2/ 2024-04-14T18:22:34-06:00 https://billpetro.com/coronation-of-queen-elizabeth-ii/ 2024-03-25T13:20:31-06:00 https://billpetro.com/history-of-palm-sunday-3/ 2024-03-22T10:44:12-06:00 https://billpetro.com/history-of-palm-sunday-how-it-starts-holy-week/ 2024-03-17T16:00:45-06:00 https://billpetro.com/movie-review-avatar-2/ 2024-03-01T15:22:52-07:00 https://billpetro.com/history-of-leap-year/ 2024-02-28T12:10:13-07:00 https://billpetro.com/history-of-amazing-grace-part-1/ 2024-02-22T09:38:28-07:00 https://billpetro.com/iphone-3g-launch-a-tale-of-two-cities-and-two-vendors/ 2024-02-19T16:45:47-07:00 https://billpetro.com/history-of-pandemics/ 2024-02-10T15:11:24-07:00 https://billpetro.com/history-of-2014/ 2024-01-18T09:38:17-07:00 https://billpetro.com/history-of-ben-franklin-6/ 2024-01-13T07:50:01-07:00 https://billpetro.com/history-of-martin-luther-king/ 2024-01-10T10:20:20-07:00 https://billpetro.com/my-top-5-articles-of-2023/ 2023-12-31T11:36:42-07:00 https://billpetro.com/history-summer-love-1967-sex-drugs-rock-roll/ 2023-12-27T13:00:40-07:00 https://billpetro.com/history-of-the-summer-of-love-1967-part-2-sex/ 2023-12-27T12:50:24-07:00 https://billpetro.com/history-of-the-summer-of-love-1967-part-3-drugs/ 2023-12-27T12:50:22-07:00 https://billpetro.com/history-of-the-summer-of-love-1967-part-3-drugs-copy/ 2023-12-27T12:30:33-07:00 https://billpetro.com/history-of-the-feast-of-st-john-the-apostle/ 2023-12-25T16:29:58-07:00 https://billpetro.com/history-of-christmas-the-year-how-could-jesus-be-born-4-b-c/ 2023-12-04T16:45:36-07:00 https://billpetro.com/history-of-christmas-advent-2/ 2023-12-01T13:35:04-07:00 https://billpetro.com/history-of-christmas-advent-3/ 2023-12-01T13:34:46-07:00 https://billpetro.com/history-of-a-sacred-oratorio-6/ 2023-11-27T09:37:24-07:00 https://billpetro.com/can-listen-christmas-music-now-start-celebrating-holidays/ 2023-11-21T09:36:39-07:00 https://billpetro.com/six-blades-when-five-just-arent-enough/ 2023-11-20T16:30:14-07:00 https://billpetro.com/history-of-election-day/ 2023-10-30T17:43:16-06:00 https://billpetro.com/history-of-daylight-saving-time-ending-x/ 2023-10-30T16:25:23-06:00 https://billpetro.com/history-of-october-31-x/ 2023-10-28T11:36:02-06:00 https://billpetro.com/concert-review-chicagoearth-wind-fire-at-red-rocks-in-denver-2/ 2023-09-20T17:18:37-06:00 https://billpetro.com/history-of-star-trek-2/ 2023-09-09T12:26:35-06:00 https://billpetro.com/crosby-stills-nash-young-at-red-rocks-in-denver-2/ 2023-08-14T17:29:11-06:00 https://billpetro.com/history-of-apple-lisa-meet-its-creators/ 2023-08-08T10:49:50-06:00 https://billpetro.com/movie-review-mission-impossible-dead-reckoning-part-one/ 2023-07-18T19:21:08-06:00 https://billpetro.com/movie-review-mission-impossibleiii-2/ 2023-07-14T13:56:19-06:00 https://billpetro.com/history-of-explo-72-the-apex-of-the-jesus-movement-50-years-ago/ 2023-06-24T13:44:07-06:00 https://billpetro.com/thinking-about-ai-in-big-tech-earnings/ 2023-05-11T17:24:01-06:00 https://billpetro.com/martin-luther-part-4-outlawed/ 2023-04-17T09:18:05-06:00 https://billpetro.com/movie-review-jesus-revolution/ 2023-03-08T11:59:27-07:00 https://billpetro.com/history-of-the-long-year/ 2023-02-06T13:53:58-07:00 https://billpetro.com/information-growing-exponentially/ 2023-01-12T13:11:10-07:00 https://billpetro.com/top-5-of-2021/ 2022-12-29T16:36:42-07:00 https://billpetro.com/star-wars-vs-star-trek/ 2022-11-12T09:39:22-07:00 https://billpetro.com/history-of-veterans-day-2/ 2022-11-10T09:28:30-07:00 https://billpetro.com/history-of-veterans-day-3/ 2022-11-10T09:27:58-07:00 https://billpetro.com/history-of-veterans-day-lest-we-forget/ 2022-11-10T09:27:37-07:00 https://billpetro.com/whither-twitter/ 2022-11-10T09:11:06-07:00 https://billpetro.com/to-twitter-two-twitters-to-tweet-2/ 2022-11-08T15:14:41-07:00 https://billpetro.com/movie-review-harry-potter-and-the-goblet-of-fire-2/ 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2021-01-18T18:32:36-07:00 https://billpetro.com/zooomr-for-photo-sharing-2/ 2021-01-12T00:08:02-07:00 https://billpetro.com/movie-review-hairspray/ 2021-01-11T23:46:25-07:00 https://billpetro.com/star-wars-rise-of-skywalker/ 2021-01-11T23:43:50-07:00 https://billpetro.com/history-of-2010-start-of-a-new-decade/ 2020-12-30T11:41:52-07:00 https://billpetro.com/history-of-vaccines-what-this-means-for-coronavirus/ 2020-12-28T10:33:42-07:00 https://billpetro.com/history-of-coronavirus-how-will-it-end/ 2020-12-20T15:57:43-07:00 https://billpetro.com/movie-review-rogue-one-2/ 2020-11-17T19:36:09-07:00 https://billpetro.com/history-of-02-02-2020/ 2020-02-02T14:38:42-07:00 https://billpetro.com/history-of-080808/ 2020-02-01T17:29:10-07:00 https://billpetro.com/movie-review-star-trek-beyond-2/ 2019-12-21T16:23:07-07:00 https://billpetro.com/movie-review-star-trek-into-darkness-2/ 2019-12-21T16:18:53-07:00 https://billpetro.com/history-martin-luther-part-2/ 2019-11-01T12:03:51-06:00 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https://billpetro.com/history-of-2013-best-of-billpetro-com/ 2014-01-01T11:48:53-07:00 https://billpetro.com/wildfire-in-colorado-springs-black-forest-fire/ 2013-06-12T13:38:18-06:00 https://billpetro.com/the-aftermath-waldo-canyon-fire-in-colorado-springs/ 2012-06-29T14:48:23-06:00 https://billpetro.com/wildfire-in-colorado-springs-the-waldo-canyon-fire/ 2012-06-27T09:54:38-06:00 https://billpetro.com/future-of-google-is-it-the-next-social-platform/ 2011-07-25T07:52:28-06:00 https://billpetro.com/history-of-2011-start-of-a-new-decade/ 2010-12-30T01:30:23-07:00 https://billpetro.com/history-of-10-10-10/ 2010-10-08T01:30:33-06:00 https://billpetro.com/history-of-christmas-why-do-we-celebrate-it-on-december-25/ 2009-11-29T21:13:24-07:00 https://billpetro.com/history-of-july-8/ 2009-07-07T01:00:41-06:00 https://billpetro.com/history-of-square-root-day/ 2009-03-03T07:53:16-07:00 https://billpetro.com/clariion-co-stars-in-body-of-lies/ 2008-10-22T14:16:50-06:00 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2006-11-26T23:39:00-07:00 https://billpetro.com/history-of-christmas-season/ 2005-11-29T10:29:00-07:00 https://billpetro.com/concert-review-chicagoearth-wind-fire-at-red-rocks-in-denver/ 2005-08-25T12:02:00-06:00