diff --git a/src/locale/pl.js b/src/locale/pl.js
index 2ef1c827..f2afbe91 100644
--- a/src/locale/pl.js
+++ b/src/locale/pl.js
@@ -46,6 +46,7 @@ const locale = {
   monthsShort: 'sty_lut_mar_kwi_maj_cze_lip_sie_wrz_paź_lis_gru'.split('_'),
   ordinal: n => `${n}.`,
   weekStart: 1,
+  yearStart: 4,
   relativeTime: {
     future: 'za %s',
     past: '%s temu',