"Thu, 23 Apr 1970 07:12:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700423
Only TIME
07:12:37
General datetime
1970-04-23 07:12:37Z
For Database
1970-04-23 07:12:37
For HTTP1.1
Thu, 23 Apr 1970 07:12:37 GMT