Changing the calendar's date on the Dreamcast's internal clock causes a number of interesting results:
By changing the date to New Years Day (01/01/XXXX) while playing as Joey T., he will wear a Happy New Year's baby costume.
Setting the date to St. Patrick's Day (03/17/XXXX), the boxing ring turns green decorated with four-leaf clovers, along with the words "Happy St. Patrick's Day" and having the dressed as a leprechaun.
4th of July (07/04/XXXX) gives G. C. Thunder an Uncle Sam costume.
On Halloween (10/31/XXXX) J. R. Flurry dons a skeleton costume and the ring is decorated with skeletons with the words "Happy Halloween"
For Christmas Day (12/25/XXXX) Selene Strike wears an elf costume as well as Rumble Man becoming a giant snowman. The ring will also have a snowman design.
On Easter (04/23/XXXX) Mama Tua wears an Bunny costume along with the ring being decorated with Easter Eggs with the words "Happy Easter!"
And for Valentine's Day (02/14/XXXX) Lulu Valentine sports a sexy lingerie costume along with the ring being decorated with roses and the words "Happy Valentine's Day".