Set hour(0) not working

[mort3za]

I think there is a bug in .hour(number):
new persianDate([1397,1 ,1 , 2]).hour(0).format()
Should return "۱۳۹۷-۰۱-۰۱ ۰۰:۰۰:۰۰ ق ظ"
But returns ۱۳۹۷-۰۱-۰۱ ۰۲:۰۰:۰۰ ق ظ (same as input)

Same issue for other similar methods such as .minute(), ...

[mokhosh]

i had the same problem with second(0).
after scratching my head for a good couple of minutes i guessed that the issue is related to javascript treating 0 as a falsy value and recognizing second(0) as a getter and not a setter. so i did this as a work around and it works: second('0')
just wrap 0 in a string.