Whether a day is interpretted as a literal day or as a year depends on the context. Interpretters looked at the 70 sevens of the Daniel 9 and almost unanimously decided it cannot be literal days, but it could be years. (However, some interpretters duck the whole issue and go for an indeterminate length of time.)
With the 1290 days (Daniel 12:11) and 1335 ...
If I understand what you’re asking correctly, I don’t think that the anointing of oil was the actual burial. Jesus was buried in the tomb.
Jesus was buried because
1. It was the normal thing to do
2. It was prophesied in Isaiah 53:9
“And he made his grave with the wicked, and with the rich in his death; because he had done no violence, neither was any ...