Filter a list on event year

I have a repeating group with a list of events in it.
I want to create two buttons called “THIS YEAR” and “NEXT YEAR”, that will filter the current list with events having “Event date” (which is a field) this year or next year.

I´m trying to do this with a workflow - display list and then “filter” the list by “Event date”. I just can´t manage to set that filter to “current year” or “2015”. How do I extract a certain year (months and days not effecting)?

In my head this seems so easy but I´m stuck!!

I think what you need to use is the advanced filter option in the filter. Then you’ll be able to have some more freedom to create expressions like "field’s extracting (year) is 2008