filter by year only in date column

I'm trying to figure out how to filter by the year only in a column where I have dates specified as dd/mm/year.

This is being done through VBA and I tried the following (relevant code posted), but it doesn't seem to be working:

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Any suggestions or help is appreciated.

Thanks for the suggestion. That would definitely work, but it forces me to either:
1) have live formulas to extract the year in my workbook (not a fan of this because once the data gets large the file will be slow)
or
2) add the extra column and formula through code (I can delete the formulas via code after filtering is complete)

I would go with option 2, but a part of me wants to believe there is an easier way with the autofilter. Wishful thinking perhaps...