Dynamic calculation of year

Have a look at the Date/Time functions help here:

https://docs.safe.com/fme/html/FME_Desktop_Documentation/FME_ReadersWriters/!Transformer_Parameters/Date-Time-Functions.htm

The particular functions to consider are:

• DateTimeNow() to generate the current datetimestamp, which has in it the current year
• DateTimeFormat() to extract the current Year with format %Y as the formatter
• DateTimeParse() to create a datetimestamp for a particular date, for the current year found with DateTimeFormat()
• DateTimeAdd() will add or subtract from this date a particular interval say, +1 year or -1 year

If instead you want to/are more comfortable, working with these functions in equivalent dedicated transformers rather than writing out date/time formulae, have a look at:

• DateTimeStamper
• DateTimeConvertor
• DateTimeCalculator