fuzzyworld

when-am-i / files / src / data / calendars / colonial-america.json

colonial-america.json

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26a02b71 2026-06-19 Pavel Safronov1{
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26a02b71 2026-06-19 Pavel Safronov566 ]
567 ]
568 }
569 },
570 "eras": [
571 {
572 "name": "Colonial (Old Style)",
573 "start": "1607-05-14",
574 "end": "1752-09-14",
575 "calendar": "Julian",
576 "usedBy": "English colonists",
577 "description": "From the first permanent English settlement at Jamestown (1607), English colonists across British North America used the Julian calendar ('Old Style'), as in Britain, until the 1752 calendar reform. The cutover was empire-wide, so this applies to the whole British seaboard — Boston included, not just one town.",
578 "sources": [
579 "https://en.wikipedia.org/wiki/British_America",
580 "https://en.wikipedia.org/wiki/Jamestown,_Virginia",
581 "https://en.wikipedia.org/wiki/Old_Style_and_New_Style_dates",
582 "https://en.wikipedia.org/wiki/Julian_calendar"
583 ]
584 },
585 {
586 "name": "New Style (Gregorian)",
587 "start": "1752-09-14",
588 "end": null,
589 "calendar": "Gregorian",
590 "usedBy": "British colonists, then Americans",
591 "description": "Britain and its colonies adopted the Gregorian calendar in 1752 under the Calendar (New Style) Act 1750: Wednesday 2 September (Julian) was followed by Thursday 14 September (Gregorian), simultaneously across all British possessions.",
592 "sources": [
593 "https://en.wikipedia.org/wiki/Calendar_(New_Style)_Act_1750",
594 "https://en.wikipedia.org/wiki/Gregorian_calendar"
595 ]
596 }
597 ]
f277378b 2026-06-24 Pavel Safronov598}