@alexryzawlskiqBU-X4OF Depends where you are - in my area (central belt of Scotland) hawthorn isn't out yet, and cherry blossom is still going strong! So a location might also help.
But it definitely isn't hawthorn blossom, and doesn't look very much like cherry to me either. I think it's an apple which has been hard pruned some years ago, put up a lot of water-shoots and now the watershoots are mature enough to blossom, and are doing so enthusiastically.
We'll know when we see a close up of the blossom and leaves.
“I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh
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Some close ups, as @Uff says, will help with an ID @prenn
We'll know when we see a close up of the blossom and leaves.