The holiday could be New Years. Definitely multinational because EVERYONE has a new years.

For the creatu, i was thinking a jellyfish type one. I'm not good at making the colored pictures on the computer but if needed I can try to make a pencil sketch.  If anyone wants to try making one and post it you're more than welcome!

       Baby Jellyfish                                Moon Jellyfish
               

If there was gonna be a secondary seasonal, something based off of a nudibranch would be cool. Its a sea slug type animal that comes in many different shapes and colors. Something to inspire many artistic ideas!



The only problem is, these animals don't have any direct connection to the new years, but other than the Chinese zodiac animals, i cant think of any others that would anyways. I specifically chose aquatic animals though since I was hoping for Aquati to get a seasonal creatu.  Also, new years is pretty close to Christmas.

that ^ and the jelly fish looks cool :)

however if we were to get a new seasonal of any kind

i would like it to be sometime in the summer(yes i know there 

are no holidays then) so it would fill in the gap

between easter and halloween. it kinda

sucks having to wait so long for a hunt.

 Yeah, it would be awesome to find a summer holiday! Instead of holidays they should have done seasonal creatu for each season, since theres 4 seasons and 4 planets.
 Maybe this one could just be for the summer season instead of a specific holiday.

But with this, the problem would be that people around the world get different seasons on different times of the year depending on where they live......this is much more difficult than it would seem =/


Thanks a lot for your feedback =)

Thank you! Seems like a lot of people want a seasonal for Aquati, this is all I could think of for now.
More opinions or ideas welcomed =P