10.5 supports 2 digit years, and converts them to a year near 2000 (same as YY). Y was added in 2.11.1. How to convert a byte array (SQL Server Timestamp) to DateTime (C )? How can I convert an array of bytes into DateTime? I must do this because I use a property (named CreationDataStamp) with attribute Timestamp for entity framework. Converting datetime to POSIX time.