My PHP helper class
Examples
Convert MySQL datetime to Russian datetime, for example 2017-05-29 05:48:20
converts to 29.05.2017 05:48:20
Helper::datetimeFromMysqlToRussian('2017-05-29 05:48:20');
Convert "six digit date"
to like MySQL date format, for example 240316
converts to 2016-03-24
Helper::dateFromSixDigitsToMysql('240316');
Convert date like 08/16/2017
to like MySQL date format, for example 08/16/2017
converts to 2017-08-16
Helper::dateFromUsaSlashesToMysql('08/16/2017');