At SIHH 2012, which begins January 16th, Parmigiani Fleurier will unveil their first annual calendar. The Fleurier manufacture developed this new complication based on their PF 331 automatic caliber, with the addition of a new module, creating the PF 339 Annual Calendar caliber. An annual calendar automatically adjusts for the variation in the number of days each month, as opposed to having to manually adjust like on most timepieces. It does, however, need to be manually adjusted once each year (for the month of February in non-leap years). In a leap year, which coincidentally is coming up in 2012, the date will display February 29 and will automatically move to March 1 the following day.