"Thu, 14 May 1970 07:12:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700514
Only TIME
07:12:37
General datetime
1970-05-14 07:12:37Z
For Database
1970-05-14 07:12:37
For HTTP1.1
Thu, 14 May 1970 07:12:37 GMT