"Thu, 15 Jan 1970 00:52:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
00:52:55
General datetime
1970-01-15 00:52:55Z
For Database
1970-01-15 00:52:55
For HTTP1.1
Thu, 15 Jan 1970 00:52:55 GMT