| Country | Day | Month | Names |
 Estonia | 1 | December | Oskar, Osmar, Oss |
| Estonia | 2 | December | Aira, Aire, Airi |
| Estonia | 3 | December | Leiger, Leino |
| Estonia | 4 | December | Barbara, Barba, Parba, Varve, Varje, Varju |
| Estonia | 5 | December | Selma, Selme |
| Estonia | 6 | December | Nigulas, Nigul, Nikolai, Niilas, Niilo, Nils, Klaus, Laas, Laus |
| Estonia | 7 | December | Sabiine, Piine |
| Estonia | 8 | December | Külli, Küllike, Külliki, Külve, Külvi |
| Estonia | 9 | December | Raido, Raidu, Raigo, Raiko, Raid, Raik, Rait |
| Estonia | 10 | December | Juudit, Juta |
| Estonia | 11 | December | Daaniel, Taaniel, Tanel, Tani, Taano, Tanno |
| Estonia | 12 | December | Aivar, Aiver, Aivo |
| Estonia | 13 | December | Lucia, Hele, Ele, Ere, Loviise, Luise, Viise |
| Estonia | 14 | December | Eho, Hengo, Hingo |
| Estonia | 15 | December | Kalli, Kelli, Kulla, Killu |
| Estonia | 16 | December | Adelheid, Adeele, Ethel, Aade, Aale, Teele, Haide, Aliide, Liide |
| Estonia | 17 | December | Rahel, Raili |
| Estonia | 18 | December | Neeme, Neemo |
| Estonia | 19 | December | Maarius, Mario, Mairo |
| Estonia | 20 | December | Pärja, Pärje |
| Estonia | 21 | December | Toomas, Toom, Tom, Tommi |
| Estonia | 22 | December | Vambola, Vambo |
| Estonia | 23 | December | Eugenia, Senna, Senni |
| Estonia | 24 | December | Aadam, Tammo, Tamur, Eeva, Eevi, Eva, Eve, Evi, Ivi, Iivi, Ivika, Eveli, Evelin |
| Estonia | 25 | December | Natalie, Neida, Taale, Taali |
| Estonia | 26 | December | Taban, Tehvan, Tahvo, Tehvo, Teho, Sten |
| Estonia | 27 | December | Sulve, Sulvi, Sula |
| Estonia | 28 | December | Piia, Piiu |
| Estonia | 29 | December | Merle, Merli, Merili, Mirle |
| Estonia | 30 | December | Taavet, Taave, Taavi, Taavo, Tavo |
| Estonia | 31 | December | Silvester, Silvar, Silver, Silvo, Melany, Melanie |
