Kir's name day is recognized on July 11th in Poland.
The name Kir is encountered infrequently within the United States as a given name, suggesting limited established history or widespread adoption. Its origin across various languages often connects to meanings implying dominion or authority. The tone associated with Kir is predominantly strong and concise, often feeling modern or techy due to its structure. While potentially leaning masculine globally, its brevity allows for a degree of unisex interpretation. Information regarding its specific historical usage within the US remains scarce.
| Country | Day | Month | Names |
 Lithuania | 15 | January | Meda, Paulius, Skirgaila, Snieguole |
| Lithuania | 31 | January | Astra, Budvile, Marcele, Skirmantas |
 USA | 31 | January | Cyrus, Kira, Kyra, Lona, Loni, Lonnie, Scarlett, Zane |
| Lithuania | 27 | February | Fortunatas, Gabrielius, Ginvilas, Skirmante |
 Latvia | 10 | March | Adrians, Kira, Laimrota, Liliana, Silvija |
 Russia | 12 | March | Kira, Marina |
 Poland | 31 | March | Amos, Balbina, Beniamin, Dobromira, Gwidon, Kirył, Korneli, Kornelia |
| Lithuania | 8 | April | Dionyzas, Girtautas, Julija, Skirgaile |
 Bulgaria | 11 | May | Kiril, Kirila, Metodi, Kiro, Kirilka, Metodiy, Metodiya |
| Lithuania | 11 | May | Mamertas, Migle, Pilypas, Skirgaudas |
| Bulgaria | 24 | May | Kiril, Kirila, Metodi, Kiro, Kirilka, Metodiy, Metodiya |
| Poland | 22 | June | Achacjusz, Achacy, Agenor, Alban, Broniwoj, Flawiusz, Innocenta, Innocenty, Kirył, Paulina |
 Greece | 7 | July | Kyriakos, Kiriaki, Kiki, Korina, Kitsos |
| Poland | 7 | July | Antoni, Benedykt, Cyryl, Estera, Kira, Metody, Piotr, Pompejusz, Sędzisława, Wilibald |
 Estonia | 24 | July | Kristiina, Kristina, Kristin, Krista, Kristi, Kristel, Kirsti, Kersti, Kerstin, Rista, Riste |
 Finland | 24 | July | Tiina, Kirsti, Kirsi, Kiia, Krista, Kristiina, Tinja |
| USA | 24 | July | Amalia, Amelia, Boris, Chris, Christa, Christen, Christian, Christiana, Christie, Christin, Christina, Christine, Christy, Chrysta, Cristina, Cristian, Declan, Kiersten, Kirsten, Kirstie, Kirstin, Krista, Kristen, Kristian, Kristi, Kristin, Kristina, Kristine, Kristy, Kristyn, Maya |
| Finland | 12 | August | Klaara, Kiira, Kira |
| Greece | 29 | September | Kiriakos |
| Latvia | 12 | October | Kira, Lase, Monvids, Valfrids, Vitenis |
| Lithuania | 30 | October | Darata, Edmundas, Skirgaila, Skirvyde |
| Estonia | 7 | November | Kiira, Kiiri, Kirke |
| Lithuania | 9 | November | Dargintas, Estela, Skirtaute, Teodoras |
 Norway | 13 | November | Kirsten, Kirsti |
| USA | 9 | December | Delfina, Delfino, Delphina, Kirby, Kirk, Kirkwood |