PCRE compatible regex tester for Persian date-time. It differs from Gregorian and Julian in the way that the first 6 months of the year (spring and summer) has 31 days in and the other 6 (autumn and winter) has 30 days. The last month of winter (Esfand) has a leap day every four years and this is accounted in this regex. The seconds does not cou…

persian_date_time.regex

(?(DEFINE)(?<delim_date>\/)(?<delim_time>:)(?<delim_datetime>-)(?<delim_fractime>\.)(?<delim_ampm> ))^(?:\d{4}(?&delim_date)(?:0*[1-6](?&delim_date)0*(?:[1-9]|[1-2]\d|3[01])|0*(?:[7-9]|1[01])(?&delim_date)0*(?:[1-9]|[1-2]\d|30))|\d{4}(?&delim_date)0*12(?&delim_date)0*(?:[1-9]|[1-2]\d)|\d{2}(?:[02468][37]|[13579][159])(?&delim_date)0*12(?&delim_date)0*30)(?:(?&delim_datetime)(?:0*(?:\d|1\d|2[0-3])(?&delim_time)0*(?:\d|[1-5]\d)(?&delim_time)0*(?:\d|[1-5]\d)(?:(?&delim_fractime)\d+)?(?!(?&delim_ampm)(?i)(?:AM|PM)(?-i))|0*(?:\d|1[0-2])(?&delim_time)0*(?:\d|[1-5]\d)(?&delim_time)0*(?:\d|[1-5]\d)(?:(?&delim_fractime)\d+)?(?&delim_ampm)(?i)(?:AM|PM)(?-i)))?$

PCRE compatible regex tester for Persian date-time. It differs from Gregorian and Julian in the way that the first 6 months of the year (spring and summer) has 31 days in and the other 6 (autumn and winter) has 30 days. The last month of winter (Esfand) has a leap day every four years and this is accounted in this regex. The seconds does not count for leap seconds as the result of UTC correction. It also doesn't count for DST as these settings are not a must in calendar and is of the issue of desire and application.