King G

[Henrymon]

When was King George VI proclaimed King

[Pinotage]

11 December 1936. That was the day his reign started; the coronation ceremony was held on 12 May 1937

[bernardo]

I think that the question refers to a ceremonial "proclamation" which happens about three days (ish) after the accession, and which is different from the automatic accession itself. i.e. 14th December. I think in Scotland it is one day later (ish). I presume the questionner was thinking of the proclamation as being distinct from the accession.