# Category : BASIC Source Code

Archive : QBFAQR01.ZIP

Filename : DAYWEEK.BAS

'

FUNCTION Zeller% (Day%, Month%, Year%) STATIC

' Zeller Algorithm : Returns Day of the Week

' Returns weekday

' 0 = sunday ... 6 = saturday

'

TmpDay% = Day%

TmpMonth% = Month%

TmpYear% = Year%

'

IF TmpMonth% > 2 THEN

TmpMonth% = TmpMonth% - 2

ELSE

TmpMonth% = TmpMonth% + 10

TmpYear% = TmpYear% - 1

END IF

Century% = TmpYear% \ 100

TmpYear% = TmpYear% MOD 100

Zeller% = (TmpDay% - 1 + ((13 * TmpMonth% - 1) \ 5) + (5 * TmpYear% \ 4) + Century% \ 4 - 2 * Century% + 1) MOD 7

'

END FUNCTION

Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/