Sander celebrates a name day on March 18 in Norway and September 11 in Estonia.
Sander is a widely recognized name in Northern Europe, particularly in Norway, Estonia, and the Netherlands, while remaining a unique choice in the USA. Originating as a shortened form of the Greek name Alexandros, it conveys a meaning related to defending mankind. The name is historically rooted in Germanic and Scandinavian linguistic traditions. Its mood is strong, clean, and modern, offering a professional yet approachable tone. The name is almost exclusively classified as masculine across all regions where it is commonly used. It represents a balanced blend of historical longevity and contemporary simplicity.
| Country | Day | Month | Names |
 Poland | 15 | January | Aleksander, Dąbrówka, Dobrawa, Domasław, Domosław, Izydor, Makary, Maur, Paweł |
| Poland | 26 | February | Aleksander, Bogumił, Cezariusz, Dionizy, Mirosław, Nestor |
| Poland | 27 | February | Aleksander, Anastazja, Auksencjusz, Gabriel, Gabriela, Honoryna, Leander, Leonard, Sierosława |
| Poland | 10 | March | Aleksander, Bożysław, Cyprian, Makary, Marceli, Porfirion |
| Poland | 18 | March | Aleksander, Anzelm, Boguchwał, Cyryl, Edward, Narcyz, Narcyza, Salwator |
| Poland | 20 | March | Aleksander, Aleksandra, Ambroży, Anatol, Bogusław, Cyriaka, Eufemia, Klaudia, Patrycjusz, Ruprecht, Wasyl, Wincenty |
| Poland | 24 | April | Aleksander, Aleksy, Egbert, Erwin, Erwina, Fidelis, Grzegorz, Horacjusz, Horacy |
| Poland | 3 | May | Aleksander, Antonina, Maria, Mariola, Świętosława |
| Poland | 18 | May | Aleksander, Aleksandra, Alicja, Edwin, Eryk, Eryka, Feliks, Irina, Liboriusz, Myślibor, Wenancjusz |
| Poland | 10 | July | Aleksander, Amelia, Aniela, Filip, January, Radziwoj, Rufina, Samson, Sylwan, Sylwana, Witalis |
| Poland | 17 | July | Aleksander, Aleksy, Andrzej, Bogdan, Dzierżykraj, Januaria, Julietta, Leon, Marceli, Marcelina, Maria Magdalena |
 USA | 28 | July | Lysander, Lysandra, Sampson, Samson, Rhonda |
| Poland | 11 | August | Aleksander, Herman, Ligia, Lukrecja, Włodzimierz, Włodziwoj, Zula, Zuzanna |
| Poland | 28 | August | Adelina, Aleksander, Aleksy, Augustyn, Patrycja, Sobiesław, Stronisław |
| Poland | 13 | September | Aleksander, Aureliusz, Eugenia, Filip, Lubor, Materna, Morzysław, Szeliga |
| Poland | 12 | December | Adelajda, Aleksander, Dagmara, Paramon, Suliwoj |
Norway 
Estonia