Maybe 
I’ve gotten similar questions to this a few times now so I decided to add two new quick ranges - This month so far and This year so far. But I’m not sure if that is what you are asking for. Do you want to exclude March, April and May?
Anyway, if This year so far is a good solution you can use today’s build (or if you wait a week it will be included in the 4.3.0 release).
The new quick ranges can be used in the Time Range override feature for the Graph Panel in the Override relative time field (now/y for this year so far and now/M for this month so far):
