UK census dates

I have the following date for UK censuses:
1941 - 7th June
1851 - 30th March
1861 - 7th April
1871 - 2nd April
1881 - 3rd April
1891 - 5th April
1901 - 31st March
1911 - 2nd April
1921 - 19th June
1931 - 26th April

I have two questions:
1. Any idea why the 1921 census was held in June, and not early April?
2. Do you have the dates for later censuses?

Guy Etchells...

1921 census delayed due to miners dispute

Full list of census at
Cheers
Guy

Gordon Johnson...

** I should also have added that the exact dates are not a specific day,
as the official time of census was midnight, so the days before and
after midnight is more exact. The idea was where people were that night,
so ensuring everyone was covered - including passengers, train, bus and
ships' crews, etc.
Gordon.