The Christmas holiday lands at an essentially random date on the Bible Calendar. There are a few places in history where the date really has been on Jesus' birthday. This article provides a date report showing the dates in question.
Because the Bible Calendar is out of phase with the Roman/Christian calendar it is possible for certain occurances of Christmas to land at exactly the correct place to be an actual birthday. The following report explores. The last time this happened on the OS calendar was January 5, 1783. This would have been the Russian Christmas that year. The next time it happens is January 11, 2543.
| Christmas Dates on OS Style Calendar | ||||
|---|---|---|---|---|
| Day | Bible Date | Modern Date | Roman Date | Number |
| Sun | 11091/8/29 AA | 24 Dec 102 NS | 25 Dec 855 AUC | AA:4045829 |
| 1591/8/29 FE | 25 Dec 102 OS | 25 Dec 102 AD | JD:1758672 | |
| Mon | 11131/8/29 AA | 24 Dec 142 NS | 25 Dec 895 AUC | AA:4060439 |
| 1631/8/29 FE | 25 Dec 142 OS | 25 Dec 142 AD | JD:1773282 | |
| Sat | 11892/8/29 AA | 30 Dec 902 NS | 25 Dec 1655 AUC | AA:4338029 |
| 2392/8/29 FE | 25 Dec 902 OS | 25 Dec 902 AD | JD:2050872 | |
| Sun | 11932/8/29 AA | 30 Dec 942 NS | 25 Dec 1695 AUC | AA:4352639 |
| 2432/8/29 FE | 25 Dec 942 OS | 25 Dec 942 AD | JD:2065482 | |
| Mon | 11972/8/29 AA | 30 Dec 982 NS | 25 Dec 1735 AUC | AA:4367249 |
| 2472/8/29 FE | 25 Dec 982 OS | 25 Dec 982 AD | JD:2080092 | |
| Sat | 12733/8/29 AA | 5 Jan 1743 NS | 25 Dec 2495 AUC | AA:4644839 |
| 3233/8/29 FE | 25 Dec 1742 OS | 25 Dec 1742 AD | JD:2357682 | |
| Sun | 12773/8/29 AA | 5 Jan 1783 NS | 25 Dec 2535 AUC | AA:4659449 |
| 3273/8/29 FE | 25 Dec 1782 OS | 25 Dec 1782 AD | JD:2372292 | |
| Fri | 13534/8/29 AA | 11 Jan 2543 NS | 25 Dec 3295 AUC | AA:4937039 |
| 4034/8/29 FE | 25 Dec 2542 OS | 25 Dec 2542 AD | JD:2649882 | |
| Sat | 13574/8/29 AA | 11 Jan 2583 NS | 25 Dec 3335 AUC | AA:4951649 |
| 4074/8/29 FE | 25 Dec 2582 OS | 25 Dec 2582 AD | JD:2664492 | |
The other type of Christmas dates follows a study of the NS calendar. The following provides the dates when this happened. Christmas in 1784 is the last time that Christmas fell on the Biblical anniversary of Jesus' birthday in the English world. It doesn't happen again until December 25, 2591.
| Christmas Dates on NS Style Calendar | ||||
|---|---|---|---|---|
| Day | Bible Date | Modern Date | Roman Date | Number |
| Tue | 11125/8/29 AA | 25 Dec 136 NS | 26 Dec 889 AUC | AA:4058249 |
| 1625/8/29 FE | 26 Dec 136 OS | 26 Dec 136 AD | JD:1771092 | |
| Wed | 11165/8/29 AA | 25 Dec 176 NS | 26 Dec 929 AUC | AA:4072859 |
| 1665/8/29 FE | 26 Dec 176 OS | 26 Dec 176 AD | JD:1785702 | |
| Wed | 11933/8/29 AA | 25 Dec 943 NS | 20 Dec 1696 AUC | AA:4352999 |
| 2433/8/29 FE | 20 Dec 943 OS | 20 Dec 943 AD | JD:2065842 | |
| Thu | 11950/8/29 AA | 25 Dec 960 NS | 20 Dec 1713 AUC | AA:4359209 |
| 2450/8/29 FE | 20 Dec 960 OS | 20 Dec 960 AD | JD:2072052 | |
| Thu | 11973/8/29 AA | 25 Dec 983 NS | 20 Dec 1736 AUC | AA:4367609 |
| 2473/8/29 FE | 20 Dec 983 OS | 20 Dec 983 AD | JD:2080452 | |
| Fri | 12735/8/29 AA | 25 Dec 1744 NS | 14 Dec 2497 AUC | AA:4645559 |
| 3235/8/29 FE | 14 Dec 1744 OS | 14 Dec 1744 AD | JD:2358402 | |
| Sat | 12775/8/29 AA | 25 Dec 1784 NS | 14 Dec 2537 AUC | AA:4660169 |
| 3275/8/29 FE | 14 Dec 1784 OS | 14 Dec 1784 AD | JD:2373012 | |
| Sun | 13583/8/29 AA | 25 Dec 2591 NS | 8 Dec 3344 AUC | AA:4954919 |
| 4083/8/29 FE | 8 Dec 2591 OS | 8 Dec 2591 AD | JD:2667762 | |
| Sun | 13606/8/29 AA | 25 Dec 2614 NS | 7 Dec 3367 AUC | AA:4963319 |
| 4106/8/29 FE | 7 Dec 2614 OS | 7 Dec 2614 AD | JD:2676162 | |
These reports are a wonderful demonstration of the quirks of parallel calendars. If you understand these reports and what drives their structure you probably have the calendar issues understood.