“Grismadevi’s themes are cycles, recreation, rest, summer and time. Her symbols are summer flowers, the color red and cups. The Buddhist Goddess whose name means ‘summer’ joins us to welcome the season and energize our efforts for Goddess-centered living. In works of art She often appears wearing the color red, the hue of life’s energy and carrying a cup offering refreshment to all in need.
On this day, people in Hong Kong take a much deserved reprieve from their labors to welcome summer and mark the halfway point in the year; we can do likewise today. This is a moment to pat yourself on the back for the magical goals you’ve attained thus far and the growing power of the Goddess within you.
Wear something red or flowery today to accent Grismadevi’s energies in and around your life. Drink red juices or eat red foods to internalize the vibrancy of summer and this Goddess. Suggestions include red grapefruit juice for purification, red peppers for zest, strawberry pie to partake in life’s sweet abundance, a tossed tomato salad for love (the dressings brings harmony), raspberries to protect your relationships and rhubarb for devotion.
FInally, leave a cup filled with reddish-colored liquid or a bouquet of fresh flowers on your alter or family table today to honor Grismadevi and welcome both Her and the summer sunshine into your home.”
(Patricia Telesco, “365 Goddess: a daily guide to the magic and inspiration of the goddess”.)
The information that I found on today’s Goddess was very limited. Mythologydictionary.com states, “Grismadevi: Buddhist – A Goddess of summer. One of the attendants of Sri. She is sometimes depicted as having the head of an animal. Also commonly known as dByar-gyi-rgyal-mo or Tibetan dByar-gyi-rgyal-ma.” 
The Encyclopedia of Hinduism: C – G, Volume 2 states that She is a “seasonal Goddess. Buddhist-Lamaist [Tibet]. Also an attendant of Sridevi. Usually accompanied by a yak. Colour red. Attributes: axe and cup.” 
Sehgal, Sunil. Encyclopedia of Hinduism: C – G, Volume 2, “Grismadevi” (p. 638).