The most important holiday for a person, for which they do not make a special day off, is his birthday. On this day, the mobile phone is bursting with an abundance of SMS congratulations, among which you can find the following: "Happy birthday!" Sincerely, but not according to the rules of the Russian language, and here's why.
Instructions
Step 1
The phrase "birthday" consists of two words in the nominative and genitive, respectively. The second is a dependent word in relation to the first. Analogues: Constitution Day, Groundhog Day, Cosmonautics Day, Air Force Day.
Step 2
The second word is formally an indirect addition, but in fact - a definition that characterizes the first. What day? - birth.
Step 3
The noun "birth" is used in the singular, in the genitive case. Belongs to the middle gender, declines according to the second type, therefore, has the ending "I".
Step 4
Verbal nouns, to which the word "birth" also belongs, have two variants of the ending: "ye" or "e": moment - moment, movement - movement. Therefore, the options are possible: birth - birth. In the phrase, respectively, the options "birthday" and "birthday" will be used.
