"Tue, 13 Jan 1970 07:42:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
07:42:49
General datetime
1970-01-13 07:42:49Z
For Database
1970-01-13 07:42:49
For HTTP1.1
Tue, 13 Jan 1970 07:42:49 GMT