| Country | Day | Month | Names |
 Estonia | 1 | January | Algo, Alo, Esmo, Uno, Uuno |
| Estonia | 2 | January | Algi, Esme, Esmi |
| Estonia | 3 | January | Gerhard, Gert, Keerdo, Kert |
| Estonia | 4 | January | Ruth, Rutt |
| Estonia | 5 | January | Lea, Leana, Liia |
| Estonia | 6 | January | Aabel, Aabi, Aabo, Aapo, Aap, Roven, Rowan |
| Estonia | 7 | January | Kanut, Nuut, Susi, Hirvo |
| Estonia | 8 | January | Gunnar, Kunnar, Kunder |
| Estonia | 9 | January | Veli, Veljo, Vello, Velvo, Veigo, Veiko, Väiko, Venda, Vendo, Venno |
| Estonia | 10 | January | Talva, Talve, Talvi |
| Estonia | 11 | January | Osvald, Ove |
| Estonia | 12 | January | Antonia, Ande, Tooni |
| Estonia | 13 | January | Hillar, Hillo, Illar, Illart, Illo |
| Estonia | 14 | January | Feliks, Õnneleid |
| Estonia | 15 | January | Salve, Salvi, Sõlmi |
| Estonia | 16 | January | Ilmar, Ilmo, Illimar |
| Estonia | 17 | January | Anton, Anto, Antu, Hando, Tõnis, Tõnu, Tõnn, Tõnno |
| Estonia | 18 | January | Laura, Lauli |
| Estonia | 19 | January | Hendrik, Henrik, Henri, Heino, Henn, Henno, Enn, Enno, Eno, Heik, Heiki, Heiko, Heigo |
| Estonia | 20 | January | Hendrika, Henna, Henni, Henriette, Jete |
| Estonia | 21 | January | Agnes, Agneta, Agne, Age, Agi, Aune, Auni, Ines, Neta |
| Estonia | 22 | January | Luule, Luuli |
| Estonia | 23 | January | Rene, Reeno, Räni, Ramon |
| Estonia | 24 | January | Naima, Naimi |
| Estonia | 25 | January | Paul, Paavel, Paavo, Paap |
| Estonia | 26 | January | Ulve, Ulvi |
| Estonia | 27 | January | Vilja, Vilje |
| Estonia | 28 | January | Kaarel, Karel, Karl, Karli, Kaarli, Kaaro, Karro, Kalle |
| Estonia | 29 | January | Valter, Valmo |
| Estonia | 30 | January | Irja, Irje, Jürja, Jürje |
| Estonia | 31 | January | Meelitu, Meelit, Meelis, Meelik, Meelo, Meelu, Meeland |
