Year To Date Filter - Multiple Years

Hi,

Lurked for a while and afraid my first post is asking for help!

This is something probably stupidly simple but baffling me trying to come up with a solution!

Basically I need to add a column to my source data so I can use it as a filter on my Pivot Table in a different workbook. - something just as simple as TRUE/FALSE if the date is YTD for all years would be ideal.

Found a simple solution looking at just the month but need it down to a daily level!

Have attached an example if that makes it any clearer! nice simple formula would be ideal as sheet is around 600,000 rows long and growing!

Thanks in advance