Changing the calendar's date on the Dreamcast's internal clock causes the boxing ring to have different designs based on the dates given:

• On New Years Day (01/01/XXXX), while playing as Joey T., he will wear a Happy New Year's baby costume, and the boxing ring has a design that reads "Happy New Year".
• On Valentine's Day (02/14/XXXX), Lulu Valentine sports a sexy lingerie costume along with the ring being designed with roses and the words "Happy Valentine's Day".
• On St. Patrick's Day (03/17/XXXX), the boxing ring has a green texture designed with four-leaf clovers, along with the words "Happy St. Patrick's Day" and having the referee dressed as a leprechaun.
• On Easter (04/23/2000), Mama Tua wears an Bunny costume along with the ring bearing a design with Easter eggs with the words "Happy Easter!"
• The 4th of July (07/04/XXXX) gives G. C. Thunder an Uncle Sam costume and the boxing ring will have a U.S. flag design.
• On Halloween (10/31/XXXX), J. R. Flurry dons a skeleton costume and the ring is designed with skeletons with a sentence that reads: "Plays well with others. Well, most of the time."
• On Thanksgiving (11/23/2000), the boxing ring will have a design with a turkey holding a sign that reads: "Eat me! it's Thanksgiving!"
• On Christmas Day (12/25/XXXX), Selene Strike wears an elf costume as well as Rumble Man becoming a giant snowman. The boxing ring also has a Christmas snowman design.