"Sun, 01 Mar 1970 12:02:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700301
Only TIME
12:02:38
General datetime
1970-03-01 12:02:38Z
For Database
1970-03-01 12:02:38
For HTTP1.1
Sun, 01 Mar 1970 12:02:38 GMT