I added the following to the above script. Please see in highlighted:
Calculates day of the week for a given date
Month: jan,feb … nov,dec (must be lower-case)
Day: 1 - 31
Year: 1900 - 2999
mmm/dd/yyyy same format as [/system clock get date]
(ex. jul/22/2009)
:local date [/system clock get date]
Math Calculation here
:local result “”
:local months [:toarray “jan,feb,mar,apr,may,jun,jul,aug,sep,oct,nov,dec”]
:local monthtbl [:toarray “0,3,3,6,1,4,6,2,5,0,3,5”]
:local daytbl [:toarray “sun,mon,tue,wed,thu,fri,sat”]
:local month [:pick $date 0 3]
:local day [:pick $date 4 6]
:local dayc [:pick $date 5 6]
:local century [:pick $date 7 9]
:local year [:pick $date 9 11]
:local yearc [:pick $date 10 11]
if the first char is a 0 (zero) only read last char, else script fails
:if ([:pick $date 4 5] = 0) do={ :set day ($dayc)}
:if ([:pick $date 9 10] = 0) do=[:set year ($yearc)]
:local sum 0
:set sum ($sum + (2 * (3 - ($century - (($century / 4) * 4)))))
:set sum ($sum + ($year / 4))
:set sum ($sum + $year + $day)
:for mindex from=0 to=[:len $months] do={
:if ([:pick $months $mindex] = $month) do={:set sum ($sum + [:pick $monthtbl $mindex]) }
}
:set sum ($sum - (($sum / 7) * 7))
:set result [:pick $daytbl $sum]
END Math Calculation
:put ($month . “/” . $day . “/” . $century . $year . " is on a " . $result)