In Congress Poland, where Russian administration affected record keeping, the Julian calendar was generally used. Often both the Gregorian and the Julian dates were used on documents, the Julian date being listed first, which may make the records confusing to novice researchers. When both dates are given, use the Gregorian date for your record keeping. The Julian calendar was no longer used after 1918. By then the two calendars were 12 days apart. | In Congress Poland, where Russian administration affected record keeping, the Julian calendar was generally used. Often both the Gregorian and the Julian dates were used on documents, the Julian date being listed first, which may make the records confusing to novice researchers. When both dates are given, use the Gregorian date for your record keeping. The Julian calendar was no longer used after 1918. By then the two calendars were 12 days apart. |