static string getEtcTimeZoneId(string $formattedTimeZone) Get an Etc/GMT timezone

string getReverseMatchingRegExp(int $length) Returns a reverse matching regular expression of

int normalizeHour(int $hour, string $marker = null) Returns a normalized hour value suitable

class DayOfYearTransformer extends

abstract string getReverseMatchingRegExp(int $length) Returns a reverse matching

string format(DateTime $dateTime, int $length)

string getReverseMatchingRegExp(int $length) Returns a reverse matching regular expression of

class DayOfWeekTransformer extends

string replaceQuoteMatch(string $quoteMatch) Replaces single quotes at the start or end of a

string getReverseMatchingRegExp(int $length) Returns a reverse matching regular expression of