Celebrate what exactly? What achievement?
Celebrate a long life of immense privilege and wealth? The deal being that in return for that immense privilege, wealth and deference the Queen has one job to do, just one. No, not cutting a ribbon or waving or making a speech, her one job as Monarch, as Head of State is to act as the ultimate backstop against the over reach of power and to protect the people and the state from that over reach. In all her long reign she was called upon to do that one job only once - and she completely failed to do it, she completely failed to stop the prorogation of Parliament.
So if when it comes to it the monarchy doesn't do the job that is the trade off for all that wealth and privilege, what is the point exactly? We are being asked to celebrate just a wealthy, privileged, 96 year old woman whom as far as I can see has never sacrificed much and utterly failed in that sense of duty everyone reveres.
So no, I see no reason to celebrate. It is impossible to avoid though. The flag wavers in our street have made the unilateral decision that there will be a street party, not sought anyone else's opinion, not thought that there might be people in the street who object, they've just assumed that everyone wants this nauseating festival of jingoistic, sycophancy rammed down their throats.
If you want a bloody party by all means do so, but do it in your garden and leave the street out of it.