If you are writing back to a date field then you just need to create the dates in FME format (YYYYMMDD). So just append 0101 to the year and then write back to a date field. If you are writing to another format then you can append 0101 and then use a DateTimeConverter to get the desired format

Hi, thank you very much for the response and sorry for the slow answer. I only had a chance to test it now.

Okay so now i am writing back into the date field with dates in the FME format (YYYYMMDD). When I try to run the workbench I get a fatal error saying: "An error occurred while attempting to convert the '' component of a date".

It is not clear to me if I should change it back into the format used in the GDB (DD-MM-YYYY) before writing it back to the GDB, so that i first create the dates, write them back into the date field in FME format, and then lastly change them back to gdb format before writing into the gdb.

I have tried both running with and without changing it back to the format used in the gdb but i get the same error.

Double check the value you are sending, you should be able to send a date in FME format

20210101 (8 digits)

or a date time

20210101000000 (14 digits)

and the writer will handle both those formats.

I can generate that error message if I send it, for example 9 digits (202101011) or 7 digits (2020011)

It will error if you attempt to send it a formatted date as in DD-MM-YYYY

This solved it for me. A few rows had not been given a year and therefore had the wrong format.

Thanks!