"Sun, 11 Jan 1970 00:02:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
00:02:49
General datetime
1970-01-11 00:02:49Z
For Database
1970-01-11 00:02:49
For HTTP1.1
Sun, 11 Jan 1970 00:02:49 GMT