The dayOfWk( Command

Command Summary

Returns an integer from 1 to 7, each representing a day of the week, given a date.

Command Syntax

dayOfWk(year,month,day)

Menu Location

Press:

1. [2ND] + [0] for the CATALOG
2. [X^-1] to jump to the letter D
3. [ENTER] to insert the command

Calculator Compatibility

TI-84+/SE

Token Size

2 bytes

dayOfWk(year,month,day) returns an integer from 1 to 7, each representing a separate day of the week. 1 represents Sunday, 2 represents Monday, and so on, until 7 goes with Saturday. The date format is different than the normal American format (month/day/year), so be careful to put the arguments in the right order.

:dayOfWk(2007,12,30)

The above code returns 1, because the 30^th of December, 2007, is a Sunday.

Error Conditions

• ERR:DOMAIN is thrown if any of the arguments are non-integral, or the date does not exist, such as the 42^nd of February. However, the year does not matter (a date that takes place in the year 10000 is valid).

Related Commands

• dbd(
• setDate(
• getDate
• getDtFmt

See Also

• Day of Week — routine to calculate the day of the week

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