Function _dateTick0

src/lib/dates.js:55–63

(calendar, sunday)

 * bool sunday is for week ticks, shift it to a Sunday.
 */
function _dateTick0(calendar, sunday) {
    if(isWorldCalendar(calendar)) {
        return sunday ?
            Registry.getComponentMethod('calendars', 'CANONICAL_SUNDAY')[calendar] :
            Registry.getComponentMethod('calendars', 'CANONICAL_TICK')[calendar];
    } else {
        return sunday ? '2000-01-02' : '2000-01-01';
    }
}

/*
 * dfltRange: for each calendar, give a valid default range