"Sun, 11 Jan 1970 01:00:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
01:00:18
General datetime
1970-01-11 01:00:18Z
For Database
1970-01-11 01:00:18
For HTTP1.1
Sun, 11 Jan 1970 01:00:18 GMT