(PHP 5 >= 5.5.0, PHP 7, PHP 8)
IntlGregorianCalendar::getGregorianChange — Get the Gregorian Calendar change date
Object-oriented style
Procedural style
Gets the Gregorian Calendar change date. This is the point at which the calendar switches from Julian dates to Gregorian dates, expressed as a Unix timestamp in milliseconds. It defaults to midnight (UTC) on October 15, 1582.
calendarAn IntlGregorianCalendar instance.
Returns the change date.