styczeń

Styczeń is January, the first month. In dates Polish puts the month in the genitive case, of January, so in records you almost always read stycznia, not styczeń: dnia dwunastego stycznia, on the twelfth of January. Month names are not capitalized in modern Polish, but old clerks often capitalized them.

Records near the start of a year may refer back to roku przeszłego, the previous year. In Russian Poland some dates are doubled, Julian then Gregorian, so 1 stycznia in the old style is 13 January in the new style during the 1800s.