Ardo's name day is celebrated on March 7 in Croatia and on October 31 in Estonia.
Ardo carries a sense of quiet strength and a natural, earthy resonance, hinting at ancient roots. Its origins are often linked to Germanic and Baltic languages, where it can signify "eagle" or "wise," lending it a distinguished yet approachable aura. The name evokes a mood that is both grounded and thoughtfully observant, often perceived as masculine. Ardo feels solid, like a well-worn stone, and possesses a gentle, enduring quality. It's a name that suggests a steady presence, unpretentious and reliable.
| Country | Day | Month | Names |
 Spain | 7 | February | Moisés, Ricardo |
 Estonia | 20 | February | Meinhard, Meino, Ardi, Hardi, Hardo, Kardo |
 Italy | 19 | March | Edoardo il martire |
| Italy | 3 | April | Riccardo |
 USA | 3 | April | Dick, Dickson, Dix, Dixie, Dixon, Doris, Ricarda, Ricardo, Rich, Richard, Richelle, Richman, Rick, Rickey, Ricky, Rosamond, Rosamund, Ryan |
| Spain | 1 | May | Berta, Tamar, Tamara, Oroncio, Andeoro, Teodardo, Paciencia |
| Italy | 5 | May | Gottardo |
| Spain | 28 | May | Agustín, Bernardo, Emilio, Germán |
 Croatia | 8 | June | Dijana, Cecilija, Medardo, Vilim |
| Italy | 8 | June | Medardo |
 Austria | 10 | June | Bardo, Diana, Heinrich, Heinz |
| Italy | 20 | August | Bernardo di Chiaravalle |
| Spain | 20 | August | Bernardo Abad |
| USA | 20 | August | Barnard, Bernard, Bernardo, Filbert, Philbert, Rey, Reyna, Reynalda, Reynaldo, Reynold |
| USA | 25 | August | Dorcas, Lanard, Lennie, Lenny, Leonard, Leonardo, Tabatha, Tabitha |
| USA | 1 | September | Debbie, Deborah, Debra, Edgar, Edgardo, Giles, Josh, Joshua, Josue, Ruth |
| Spain | 24 | September | Gerardo, Mercedes |
| Italy | 3 | October | Gerardo di Brogne |
| Italy | 13 | October | Edoardo il confessore |
| Spain | 13 | October | Eduardo |
| USA | 13 | October | Eddie, Eddy, Eduardo, Edward, Edwardine, Ned |
| USA | 16 | October | Avice, Avis, Gerar, Gerard, Gerardo, Gerrard, Hedda, Hedwig, Hedy, Heide, Heidi, Jerard, Noah, Noe |
| Spain | 25 | October | Bernardo Calvó |
 Greece | 6 | November | Leonardo |
| Italy | 6 | November | Leonardo di Noblac |
| Spain | 6 | November | Leonardo |
| Estonia | 10 | November | Martin, Mart, Mardi, Mardo, Märten, Märt |
 Poland | 21 | November | Albert, Alberta, Albertyna, Janusz, Konrad, Konrada, Maria, Piotr, Regina, Rena, Rufus, Twardosław, Wiesław |
| Croatia | 26 | November | Konrad, Leonardo, Dubravko |
