Since we are discussing the date of birth that you specified—there is no mistake. Yes, more often than not it happens that when a client orders the material titled Dates of Manipulation Modes from the Catalog of Human Population he/she receives 2 dates for each mode, one of which is a leap year and the other—a common year. However, in your case, suppression mode happened to fall on the month of January, and there can be only one date in this month.