Compare each case across both numbers. The forms below are the noun's stored reference paradigm.
Singular and plural case forms for месяц
Case
Singular
Plural
Nominative
месяц
месяцы
Accusative
месяц
месяцы
Genitive
месяца
месяцев
Dative
месяцу
месяцам
Instrumental
месяцем
месяцами
Prepositional
месяце
месяцах
Form pattern
How the forms are built
The paradigm above is authoritative. These notes expose a transparent ending change only when the stored declension family supports one.
Genitive · Singularмесяц- + -а → месяца
Keep the stored stem and add -а.
Show all case-build notes
Nominative · Singularмесяц
This is the dictionary form used to identify the noun.Nominative · Pluralмесяц- + -ы → месяцы
Keep the stored stem and add -ы.Accusative · Singularмесяц- + zero ending → месяц
Remove the zero ending; this form has a zero ending.Accusative · Pluralмесяц- + -ы → месяцы
Keep the stored stem and add -ы.Genitive · Singularмесяц- + -а → месяца
Keep the stored stem and add -а.Genitive · Pluralмесяц- + -ев → месяцев
Keep the stored stem and add -ев.Dative · Singularмесяц- + -у → месяцу
Keep the stored stem and add -у.Dative · Pluralмесяц- + -ам → месяцам
Keep the stored stem and add -ам.Instrumental · Singularмесяц- + -ем → месяцем
Keep the stored stem and add -ем.Instrumental · Pluralмесяц- + -ами → месяцами
Keep the stored stem and add -ами.Prepositional · Singularмесяц- + -е → месяце
Keep the stored stem and add -е.Prepositional · Pluralмесяц- + -ах → месяцах
Keep the stored stem and add -ах.