| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
| 130 April | ||||||
| 21 May Stanisław Biernat Birth - 1 May 1930 (19 year anniversary) Jan Bratkowski Death - 1 May 1879 (70 year anniversary) | 32 May Edward Zapałowicz + Maria Rybak Marriage - 2 May 1931 (18 year anniversary) | 43 May Eugeniusz Kubik Birth - 3 May 1939 (10 year anniversary) | 54 May Czesław Gruszka Birth - 4 May 1949 | 65 May | 76 May Maria Bratkowska Death - 6 May 1879 (70 year anniversary) Stanislaw Bratkowski Birth - 6 May 1809 (140 year anniversary) | 87 May Julia Rybak Birth - 7 May 1908 (41 year anniversary) |
| 98 May | 109 May | 1110 May | 1211 May Rosa Chargaff Birth - 11 May 1878 (71 year anniversary) | 1312 May | 1413 May | 1514 May Gertruda Kozłowska Birth - 14 May 1924 (25 year anniversary) |
| 1615 May Greta Chargaff Birth - 15 May 1910 (39 year anniversary) | 1716 May Henryk Szwarc Birth - 16 May 1944 (5 year anniversary) Zygmunt Trocha Birth - 16 May 1925 (24 year anniversary) | 1817 May Jan Bratkowski Birth - 17 May 1856 (93 year anniversary) | 1918 May | 2019 May Jan Szwarc + Władysława Sagan Marriage - 19 May 1929 (20 year anniversary) | 2120 May | 2221 May Felicitas Dingmann Birth - 21 May 1898 (51 year anniversary) |
| 2322 May AntoniRybak Birth - 22 May 1871 (78 year anniversary) | 2423 May Kazimierz Smoliński Birth - 23 May 1940 (9 year anniversary) | 2524 May | 2625 May | 2726 May Tekla Libitka Birth - 26 May 1833 (116 year anniversary) | 2827 May | 2928 May |
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