"Sun, 22 Feb 1970 12:02:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700222
Only TIME
12:02:54
General datetime
1970-02-22 12:02:54Z
For Database
1970-02-22 12:02:54
For HTTP1.1
Sun, 22 Feb 1970 12:02:54 GMT