So you’re not simply trying to delete old emails based on the date they were sent to you? It might help to know where these dates are located, if in the subject line or in the body. And is consistently a straightforward date like “2024-02-11”, or are you also trying to look for vague references like “Feb 11”? That might make a difference for how the question is answered, however a quick google search suggests that the FiltaQuilla add-on will support regular expressions in the message filters for addresses and subjects, while “Expression Search / GmailUI” adds expressions for body searches.