Declension table of sandhya

Neuter	Singular	Dual	Plural
Nominative	sandhyam	sandhye	sandhyāni
Vocative	sandhya	sandhye	sandhyāni
Accusative	sandhyam	sandhye	sandhyāni
Instrumental	sandhyena	sandhyābhyām	sandhyaiḥ
Dative	sandhyāya	sandhyābhyām	sandhyebhyaḥ
Ablative	sandhyāt	sandhyābhyām	sandhyebhyaḥ
Genitive	sandhyasya	sandhyayoḥ	sandhyānām
Locative	sandhye	sandhyayoḥ	sandhyeṣu

Compound sandhya -

Adverb -sandhyam -sandhyāt