(autohotkey) - find how many days are in a given month

days_in_month.ahk

days_in_month(date="") {
    date := (date = "") ? (a_now) : (date)
    formatTime, year,  % date, yyyy
    formatTime, month, % date, MM
    month += 1                 ; goto next month
    if (month > 12)
        year += 1, month := 1  ; goto next year, reset month
    month := (month < 10) ? (0 . month) : (month)  ; 0 to 01
    new_date := year . month
    new_date += -1, days       ; minus 1 day
    return subStr(new_date, 7, 2)
}


/*
[script info]
description = find how many days are in a given month
author      = davebrny
*/

days_in_month()
days_in_month(a_now)

days_in_month("201701")
days_in_month("20170123165500")