Wiktionary
                    dayer
                    
                        
                
                                                                    n. (context in combination English) Something lasting a specified number of days.
Wikipedia
                    Dayer
                    
                        
                
                                                                    Dayer may refer to:
- Dayer, Khuzestan, a village in Iran
- Bandar Deyr, a city in Bushehr Province, Iran
- Dayêr, village in Tibet