Declension table of ?mahāṣṭamī

Feminine	Singular	Dual	Plural
Nominative	mahāṣṭamī	mahāṣṭamyau	mahāṣṭamyaḥ
Vocative	mahāṣṭami	mahāṣṭamyau	mahāṣṭamyaḥ
Accusative	mahāṣṭamīm	mahāṣṭamyau	mahāṣṭamīḥ
Instrumental	mahāṣṭamyā	mahāṣṭamībhyām	mahāṣṭamībhiḥ
Dative	mahāṣṭamyai	mahāṣṭamībhyām	mahāṣṭamībhyaḥ
Ablative	mahāṣṭamyāḥ	mahāṣṭamībhyām	mahāṣṭamībhyaḥ
Genitive	mahāṣṭamyāḥ	mahāṣṭamyoḥ	mahāṣṭamīnām
Locative	mahāṣṭamyām	mahāṣṭamyoḥ	mahāṣṭamīṣu

Compound mahāṣṭami - mahāṣṭamī -

Adverb -mahāṣṭami