NextDayOfWeek

    $adjuster = NextDayOfWeek($day);

The $adjuster adjusts the date to the next occurrence of the given day of the week [1=Monday, 7=Sunday] that is after the date.

NextOrSameDayOfWeek

    $adjuster = NextOrSameDayOfWeek($day);

The $adjuster adjusts the date to the next occurrence of the given day of the week [1=Monday, 7=Sunday]. If the date already falls on the given day of the week it's unaltered.

PreviousDayOfWeek

    $adjuster = PreviousDayOfWeek($day);

The $adjuster adjusts the date to the previous occurrence of the given day of the week [1=Monday, 7=Sunday] that is before the date.

PreviousOrSameDayOfWeek

    $adjuster = PreviousOrSameDayOfWeek($day);

The $adjuster adjusts the date to the previous occurrence of the given day of the week [1=Monday, 7=Sunday]. If the date already falls on the given day of the week it's unaltered.

FirstDayOfWeekInMonth

    $adjuster = FirstDayOfWeekInMonth($day);

The $adjuster adjusts the date to the first occurrence of the given day of the week [1=Monday, 7=Sunday] within the month.

LastDayOfWeekInMonth

    $adjuster = LastDayOfWeekInMonth($day);

The $adjuster adjusts the date to the last occurrence of the given day of the week [1=Monday, 7=Sunday] within the month.

NthDayOfWeekInMonth

    $adjuster = NthDayOfWeekInMonth($ordinal, $day);

The $adjuster adjusts the date to the given ordinal day of the week within the month.

Parameters:

ordinal

The ordinal of the week within the month [-4, -1] ∪ [1, 4].

day

The day of the week [1=Monday, 7=Sunday].

WesternEasterSunday

    $adjuster = WesternEasterSunday();

The $adjuster adjusts the date to the Western Easter Sunday. The Western computus is based on the Gregorian calendar.

OrthodoxEasterSunday

    $adjuster = OrthodoxEasterSunday();

The $adjuster adjusts the date to the Orthodox Easter Sunday. The Orthodox computus is based on the Julian calendar with the Julian date converted to the equivalent Gregorian date.

NearestMinuteInterval

    $adjuster = NearestMinuteInterval($interval);

The $adjuster adjusts the time of day to the nearest minute of the given minute interval [1, 1440].

Given an minute interval of 30:

    T10:14:59 => T10:00:00
    T10:15:00 => T10:30:00
    T10:29:59 => T10:30:00
    T23:55:00 => T00:00:00 (midnight of the following day)