When the 'banner before dawn' appears, the invocation to the Acvins begins; they 'accompany dawn.' Some variation of fancy is naturally to be looked for.

Thus, though, as said above, Dawn is born at the Acvins yoking, yet Dawn is herself invoked to wake the Acvins; while again the sun starts their chariot before Dawn; and as sons of Zeus they are invoked "when darkness still stands among the shining clouds (cows)."[109] Husbands or brothers or children of Dawn, the Horsemen are also S[=u]ry[=a]'s husbands, and she is the sun's daughter (Dawn ?) or the sun as female.

But this myth is not without contradictions, for S[=u]ry[=a] elsewhere weds Soma, and the Acvins are the bridegroom's friends; whom P[=u]shan chose on this occasion as his parents; he who (unless one with Soma) was the prior bridegroom of the same much-married damsel.[110] The current explanation of the Acvins is that they represent two periods between darkness and dawn, the darker period being nearer night, the other nearer day.

But they probably, as inseparable twins, are the twinlights or twilight, before dawn, half dark and half bright.

In this light it may well be said of them that one alone is the son of bright Dyaus, that both wed Dawn, or are her brothers.