Declension table of mahotsava

Masculine	Singular	Dual	Plural
Nominative	mahotsavaḥ	mahotsavau	mahotsavāḥ
Vocative	mahotsava	mahotsavau	mahotsavāḥ
Accusative	mahotsavam	mahotsavau	mahotsavān
Instrumental	mahotsavena	mahotsavābhyām	mahotsavaiḥ mahotsavebhiḥ
Dative	mahotsavāya	mahotsavābhyām	mahotsavebhyaḥ
Ablative	mahotsavāt	mahotsavābhyām	mahotsavebhyaḥ
Genitive	mahotsavasya	mahotsavayoḥ	mahotsavānām
Locative	mahotsave	mahotsavayoḥ	mahotsaveṣu

Compound mahotsava -

Adverb -mahotsavam -mahotsavāt