New version - 17 Jun 23 ======================= Added: Added 24hr unpadded H mask. New UDF in zip below. Changelog:  Changelog.txt Here is my version of a UDF to transform date/time formats. It is entirely self-contained and although it defaults to English for the month/day names, you can set any other language very simply, even having different ones for the input and output. You need to provide a date/time string, a mask to tell the UDF what is in the string, and a second