The dayOfWk command
Returns an integer from 1-7 that shows what day of week it is for a specific date.
dayOfWk(year, month, day)
Menu Location
This command can't be found in any menu besides the command catalog.
This command requires a calculator with AMS version 2.07 or higher (it will also work on any TI-89 Titanium or Voyage 200 calculator)
The dayOfWk command returns an integer from 1 through 7 which shows what day of the week it was on a certain date. The Ti-89 Titanium manual says that this function may not give accurate results for years prior to 1583 (pre-Gregorian calendar).
| Integer value: | Day of the week: |
|---|---|
| 1 | Sunday |
| 2 | Monday |
| 3 | Tuesday |
| 4 | Wednesday |
| 5 | Thursday |
| 6 | Friday |
| 7 | Saturday |
:dayOfWk(1948,9,6)
: 2
:dayOfWk(1600,1,15)
: 7
The above examples find that September 6th,1948 was a Monday and that January 15th, 1600 was a Saturday. It also works with future dates, in case you want to use that in a program.