Optionalinstant: DateOptionaltimezoneOffset: numberReturns the number minutes difference between the JS date's timezone and the reference timezone.
Optionaldate: DateOptionaloverrideTimezoneOffset: numberStaticfromStaticfromOptionalinput: Date | ParsingReferenceOptionaltimezoneOverrides: TimezoneAbbrMap
Returns a JS date (system timezone) with the { year, month, day, hour, minute, second } equal to the reference. The output's instant is NOT the reference's instant when the reference's and system's timezone are different.