Dany as Azor Ahai isn’t even subtext in the books, it’s explicit. The only variation or hidden meaning that may exist perhaps is the sword, being dragons. The text does not require Lightbringer to be a literal sword; what it demands is a forging process.
First (Water): «Worked thirty days and nights. When tempering the steel in water, it broke.»
Second (Lion): «He worked fifty days and nights. He captured a lion to temper the sword in his heart. The steel exploded again.»
Third (Nissa Nissa): «Worked for a hundred days and nights until it was finished. With a heavy heart, this time, he called for his wife “Nissa Nissa,” and asked her to bare her breast. He drove his sword into her living heart, her soul combining with the steel of the sword, creating Lightbringer, the Red Sword of Heroes.»
«It is said that wielding Lightbringer once again, Azor Ahai will stand against the darkness —doesn’t have to forge a sword, because she already carries them— and if he fails, the world fails with him.»
So if Lightbringer’s forging spanned 180 days, a striking temporal parallel may be observed in A Game of Thrones —which may explain GRRM’s deliberate ambiguity regarding timeline.—
Daenerys’s arc from Pentos to Vaes Dothrak —ending in the pyre— appears to unfold across roughly half a year.
First (Water) thirty days: Leaving Pentos and crossing a land of rivers, heavy rains, and low meadows. —her hands raw from the reins.
Second (Lion) fifty days: Crossing the Velvet Hills and entering the heart of the Dothraki Sea. Drogo hunts and kills a hrakkar.
Third (Nissa Nissa) hundred days: The ritual at the pyre.