bday config message time <type> <0-23>), if for example, you run this:
bday message time birthday 9, the birthday message will send at 9 am for the birthday user. The type refers to the event type, possible values include birthday, memberAnniversary, and serverAnniversary.
bday set. For example, if my time zone is America/New_York, and my guild message time (see above) is 9 am, the birthday role will be given at 12 am in America/New_York, and the birthday message will be sent at 9 am America/New_York.