Well, you have a year to give a gift and supposedly a year to send the thank you but my daughters thank youed within a few days. I used to have a rule from my Mother which I think she got from hers, etc. The sun never sets on a gift without the thank you going out. I am surprised at how many girls do not send notes,,it sort of shocks me.
bttt
I know what you mean. I feel the thank you should be sent asap. To let a year go is rude imho. I think by the time a year has gone by that the sender has already the recipient ungrateful. imho.