"Wed, 14 Jan 1970 20:35:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
20:35:54
General datetime
1970-01-14 20:35:54Z
For Database
1970-01-14 20:35:54
For HTTP1.1
Wed, 14 Jan 1970 20:35:54 GMT