| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
| 1 Stanisław Biernat Birth - 1 May 1930 (16 year anniversary) Jan Bratkowski Death - 1 May 1879 (67 year anniversary) | 2 Edward Zapałowicz + Maria Rybak Marriage - 2 May 1931 (15 year anniversary) | 3 Eugeniusz Kubik Birth - 3 May 1939 (7 year anniversary) | 4 | |||
| 5 | 6 Maria Bratkowska Death - 6 May 1879 (67 year anniversary) Stanislaw Bratkowski Birth - 6 May 1809 (137 year anniversary) | 7 Julia Rybak Birth - 7 May 1908 (38 year anniversary) | 8 | 9 | 10 | 11 Rosa Chargaff Birth - 11 May 1878 (68 year anniversary) |
| 12 | 13 | 14 Gertruda Kozłowska Birth - 14 May 1924 (22 year anniversary) | 15 Greta Chargaff Birth - 15 May 1910 (36 year anniversary) | 16 Henryk Szwarc Birth - 16 May 1944 (2 year anniversary) Zygmunt Trocha Birth - 16 May 1925 (21 year anniversary) | 17 Jan Bratkowski Birth - 17 May 1856 (90 year anniversary) | 18 |
| 19 Jan Szwarc + Władysława Sagan Marriage - 19 May 1929 (17 year anniversary) | 20 | 21 Felicitas Dingmann Birth - 21 May 1898 (48 year anniversary) | 22 AntoniRybak Birth - 22 May 1871 (75 year anniversary) | 23 Kazimierz Smoliński Birth - 23 May 1940 (6 year anniversary) | 24 | 25 |
| 26 Tekla Libitka Birth - 26 May 1833 (113 year anniversary) | 27 | 28 | 29 | 30 | 31 Jan Biernat Birth - 31 May 1897 (49 year anniversary) |
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