"Sun, 08 Feb 1970 00:02:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700208
Only TIME
00:02:37
General datetime
1970-02-08 00:02:37Z
For Database
1970-02-08 00:02:37
For HTTP1.1
Sun, 08 Feb 1970 00:02:37 GMT