"Tue, 13 Jan 1970 12:32:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
12:32:21
General datetime
1970-01-13 12:32:21Z
For Database
1970-01-13 12:32:21
For HTTP1.1
Tue, 13 Jan 1970 12:32:21 GMT