When to celebrate your birthday?

Let me tell you a little story. One year on the eve of my birthday, I was thinking of staying up a little longer until after midnight to mark the exact time of my birth. Then I thought, wait a minute. The time had already passed because I was in a different timezone! Then I thought, well, if you really want to be precise, you’d have to take into account the exact duration of a year. The time it takes the earth to revolve around the sun, the “tropical year”, is 365.2422 days (sort-of).

Here’s a spreadsheet, which you can download for Excel below.

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http://Yost.com/Misc/birthdays/ - this page
1998-01-02 Created
1998-01-11 Modified
1999-10-10 Modified cosmetically
2016-02-22 updated spreadsheets
2018-11-22 updated spreadsheets