"Sun, 22 Feb 1970 12:03:41"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700222
Only TIME
12:03:41
General datetime
1970-02-22 12:03:41Z
For Database
1970-02-22 12:03:41
For HTTP1.1
Sun, 22 Feb 1970 12:03:41 GMT