Sometimes Church Slavic books need to be converted to the Mundane Era of Constatinople. To convert to the western calendar, subtract 5508.

• In Russia before 1700, the year began on September 1st, so that there are always two possible years, by subtracting 5508 and 5509. Thus, 7203 in the Mundane Era is 1694 or 95 in the Christian Era.
  If the month is known, then the exact date can be determined.