I think my pale purple lilac bushes will be blooming next weekend, in about a week after that the white lilac bush should be blooming (not a lot of clusters on it, it's a new bush, maybe 5-10 clusters)
My lilly of the valley (my favorite flower!) should be blooming within a month. This is all earlier than normal thanks to our fabulous early spring, they don't normall bloom until the 2nd-3rd week in May.
If you have an event coming up and want fragrant lilacs, let me know. I'd be more than happy to share!
I have peony bushes as well with white peonies, but since the sprouts of branches have just started coming up, I'm thinking mid May to June for those.