Manta's name day is celebrated on October 26 in Finland.
Manta functions as an exceptionally rare given name in the USA, holding minimal statistical history in American nomenclature. Its linguistic origin is heavily tied to the majestic marine animal, linking the name directly to powerful natural imagery and the ocean. The mood associated with Manta is strong, nature-like, and exotic, suggesting boldness and unique elegance. Functionally, Manta operates as a widely recognized unisex identifier due to its non-traditional naming structure. It is an unconventional choice, reflecting a desire for a name that is both rare and evocative of wild beauty.
| Country | Day | Month | Names |
 Lithuania | 4 | January | Arimantas, Arimante, Benedikta, Titas |
| Lithuania | 23 | January | Algimantasp, Gailgedas, Gunda, Raimundas |
| Lithuania | 25 | January | Jaunutis, Jomantas, Povilas, Viltenis, Ziede |
| Lithuania | 26 | January | Daugis, Eigile, Justas, Rimantas |
| Lithuania | 31 | January | Astra, Budvile, Marcele, Skirmantas |
| Lithuania | 4 | February | Andrius, Arvile, Gustas, Joana, Vydmantas |
| Lithuania | 8 | February | Daugvile, Dromantas, Honorata, Saliamonas |
| Lithuania | 24 | February | Gedmantas, Goda, Motiejus |
| Lithuania | 25 | February | Margiris, Rasa, Regimantas, Viktoras |
| Lithuania | 8 | March | Beata, Gaudvile, Laima, Vydmantas |
| Lithuania | 9 | March | Dominykas, Pranciska, Visgaile, Zygimantas |
| Lithuania | 14 | March | Darmantas, Karigaile, Matilda |
| Lithuania | 20 | March | Filomenas, Imgarda, Irma, Tautvile, Zygimantas |
| Lithuania | 24 | March | Daumantas, Donardas, Gabrielius, Ganvile, Liucija |
| Lithuania | 25 | March | Bermantas, Kantrimas, Normantas, Normante |
| Lithuania | 30 | March | Ferdinandas, Gvidonas, Meda, Rusne, Virmantas |
| Lithuania | 12 | April | Damijonas, Galmantas, Julius, Jurate |
| Lithuania | 25 | April | Grazvyda, Grazvyde, Morkus, Tolmantas, Zadmante |
| Lithuania | 29 | April | Augustinas, Indre, Rita, Tarmantas |
| Lithuania | 1 | May | Vydmante, Zigmantas, Zigmas, Zilvinas |
| Lithuania | 2 | May | Atanazas, Eidmantas, Meile |
| Lithuania | 16 | May | Bite, Ubaldas, Vaidmantas |
| Lithuania | 22 | May | Aldona, Eimantas, Elena, Julija, Rita |
| Lithuania | 24 | May | Gerardas, Gina, Vilmantas |
| Lithuania | 25 | May | Almantas, Danute, Urbonas |
| Lithuania | 26 | May | Algimantas, Eduardas, Milvyde, Vilhelmina |
| Lithuania | 11 | June | Aluona, Flora, Ramintas, Tvirmantas |
| Lithuania | 11 | July | Kipras, Kiprijonas, Pijus, Sarune, Vilmantas |
| Lithuania | 15 | July | Gerimante, Mantas, Rozalija, Roze |
| Lithuania | 4 | August | Domantas, Gerimantas, Irta, Milgede |
| Lithuania | 10 | August | Aiste, Asterija, Astra, Laurynas, Norimantas |
| Lithuania | 18 | August | Gendvile, Ilona, Mantautas, Sailenis, Saulene |
 Latvia | 19 | August | Imanta, Marlene, Melanija |
| Lithuania | 23 | August | Girmantas, Pilypas, Tautgaile |
| Lithuania | 31 | August | Raimunda, Raimundas, Vilmantas, Vilmante |
| Lithuania | 13 | September | Barmantas, Barvyde, Mangailis |
| Lithuania | 15 | September | Eugenija, Nikodemas, Rimgaile, Vismantas |
| Lithuania | 30 | September | Bytaute, Jeronimas, Sofija, Zymantas |
| Lithuania | 1 | October | Benigna, Mantas, Minte, Remigijus |
| Lithuania | 6 | October | Brunonas, Budvydas, Eismantas, Vytene |
| Lithuania | 3 | November | Hubertas, Narvaine, Silvija, Vydmantas |
| Lithuania | 6 | November | Asmantas, Leonardas, Vygaude |
| Lithuania | 12 | November | Alvile, Asmantas, Kristinas, Renata |
| Lithuania | 14 | November | Emilis, Judita, Ramantas, Saulene |
| Lithuania | 21 | November | Alberta, Eibarte, Gomantas, Honorijus |
| Lithuania | 27 | November | Girvyde, Skomantas, Virgilijus |
| Lithuania | 6 | December | Bilmantas, Mikalojus, Norvyde |
Finland