site.btaToday's Observances: May 31
                                            
                                                                                                                                                        World No Tobacco Day (BTA photo)
                                                                                                                
                    
                    
                        
                                                                                            
                        
                    
                                                        
                    
                
                The world: - World No Tobacco Day. On this date in Bulgarian history: 1902: Russo-Bulgarian Military Convention signed in St. Petersburg to provide mutual military aid in case Bulgaria or Russia is attacked by Austria-Hungary, Romania
                                    
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