In the 1939 register there is a David Day born 16 May 1884 living at 81 Perryfields Road , Bromsgrove, married, with Jessie Hutchings born 10 October 1893 whose name has been changed to Jessie Day in green ink. There are three redacted entries.
Someone on their public tree on ancestry has her married to David Day.
I can't see a marriage for them on FreeBMD or ancestry

There is the death of a Jessie Day March 1/4 1975 Bromsgrove registration district age at death 75 birth date 9 October 1893.
I can't see a death for a David Day born c1884 in Worcestershire up to 1984

Getting the certificates is the way to go
Christina