"Sun, 29 Mar 1970 07:12:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700329
Only TIME
07:12:18
General datetime
1970-03-29 07:12:18Z
For Database
1970-03-29 07:12:18
For HTTP1.1
Sun, 29 Mar 1970 07:12:18 GMT