Since every season of the year has at least one holiday, I decided to make art out of that. As you can see, it follows the general flow of the seasons: Summer, Autumn, Winter and Spring. I even gave each season its own symbol:
Summer - A bright sun behind a pair of clouds
Autumn - Three colored leaves (duh)
Winter - A Snowflake (duh again)
Spring - A flower (duh thrice)
As for the symbol at the center, i just needed something to tie it all together, so i went for a random image. As you can see, i've represented nearly every well-know holiday of each season with an apropos symbol;
Summer Holidays - A graduation day hat (self-explanatory), a Male symbol for Father's Day and an American Flag for the Fourth of July.
Autumn Holidays - A Jack-O-Lantern for Halloween, a Remembrance ribbon for Veterans' Day and a living turkey for Thanksgiving
Winter Holidays - A Menorah for Hanukkah, a Christmas Tree (self-explanatory), a Kinara for Kwanzaa, a clock for New Years' Eve, a Groundhog and its shadow for Groundhog's Day, and a Heart for Valentine's Day.
Spring Holidays - A Shamrock for Saint Patrick's Day, a rabbit for Easter and a Female symbol for Mother's Day.
What do you think?