Allowable Dates

Discussion around the Swiss Micros DM42 calculator.
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lrdheat
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Joined: Tue May 02, 2017 4:17 pm

Allowable Dates

Post by lrdheat » Thu Feb 21, 2019 6:04 pm

I was wondering (just out of curiosity) what the limits are for allowable dates. DOW finds day of week for days in the year 4000 but shows invalid data for the year 5000. What is the lower end as well?

Thomas Okken
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Re: Allowable Dates

Post by Thomas Okken » Thu Feb 21, 2019 6:57 pm

From http://thomasokken.com/free42/extensions.html
Note: the date functions handle dates between October 15, 1582, and September 10, 4320. The former is the first day of the Gregorian Calendar, and the latter is 999,999 days later.
These are the same limits that apply to the HP-82182A Time Module and the HP-41CX.

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