I hear there's a limited-time Solstice Dragon that looks like the Sun Dragon for the Summer Solstice. There was no in-game update referencing the dragon at all.
How can I breed a Solstice Dragon?
How to breed a Solstice Dragon
dragonvale
Related Solutions
Per the wiki:
The Sakura Dragon can be bred by using a combination of dragons whose elements include plant, earth, and fire. The in game splash message indicated that you must be level 11+ to breed this dragon.
You may have bred a Sakura dragon if you get a breed time of 10 hours, but you will have to wait till you see the egg to be sure, since it could be a Lava dragon as well. The egg is brown egg with three cherry blossoms on it, like this:
The sakura dragon is only breedable until May 3rd.
Here's something on the dragonvale wiki: I haven't verified it though.
That is, a Water Dragon with a Lightning hybrid.
And you know you have one by checking out the eggs and incubation time here.
Best Answer
From the Dragonvale Wiki entry on Solstice Dragon:
The breeding time for a Solstice Dragon is 23.5 hours. Note you'll need a Sun habitat to hatch one, they are Sun elemental. According to the Dragonvale Facebook pageThey will remain until June 27. It's suggested by BackFlip that it's easier to get one during the day of the solstice (that's June 20th for the summer solstice). It will keep returning during the winter and summer solstices.
Note that the Sun/Solstice pairing has a higher chance of getting you a Solstice Dragon, but the breeding times will be much longer for failures. Also, due to the requirements of a Blazing Dragon, you'll need to be level 14 in order to breed the prerequisite dragons.