"Sun, 22 Feb 1970 07:11:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700222
Only TIME
07:11:42
General datetime
1970-02-22 07:11:42Z
For Database
1970-02-22 07:11:42
For HTTP1.1
Sun, 22 Feb 1970 07:11:42 GMT