Vertumnus

In Roman mythology, Vertumnus — also Vortumnus or Vertimnus — is the god of seasons, change and plant growth, as well as gardens and fruit trees. He could change his form at will; using this power, according to Ovid's Metamorphoses (xiv), he tricked Pomona into talking to him by disguising himself as an old woman and gaining entry to her orchard, then using a narrative warning of the dangers of rejecting a suitor (the embedded tale of Iphisand Anaxarete) to seduce her. The tale of Vertumnus and Pomona has been called the only purely Latin tale in Ovid's Metamorphoses.

Vortumnus' festival was called the Vertumnalia and was held 13 August.

Source: https://en.wikipedia.org/wiki/Vertumnus