have had your/its day
have had its/(one's) day
To be past the highest point of success or potential in life. My father has had his day. Now, it's time he let his children take over the family business. It often seems that letter writing has had its day.
have had its day
to be no longer useful or successful. Streetcars have had their day in most American cities. Some people think that the fountain pen has had its day, but others prefer it to other kinds of pens.
have had your day
COMMON If someone or something has had their day, the period during which they were most successful has now passed. In Hollywood, there were still loyal supporters, but the general feeling was that he had had his day. Has radio had its day or is the golden age still to come?