"Sat, 14 Feb 1970 07:50:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700214
Only TIME
07:50:37
General datetime
1970-02-14 07:50:37Z
For Database
1970-02-14 07:50:37
For HTTP1.1
Sat, 14 Feb 1970 07:50:37 GMT