1) First, of course, is the weather. Although if I'm honest, you couldn't tell it's here from the temperatures we've been experiencing. The equinox was a week ago, but the morning temperature has been below freezing every day since then.
2) The first blossoms. The first shot is of a sansuyu 산수유 outside the door of my school.The next two are the kenari or Japanese cornel dogwoods that line a sidewalk on my morning walk to work. They're also called "golden bell".
3) Baseball's Opening Day is this Saturday. And I have tickets. Nexen Heroes vs Hanhwa Eagles at Mok-dong Stadium at 2 PM.
4) The most definitive sign that Spring is really here is when restaurants drag tables and chairs out onto the sidewalk so patrons can enjoy the al fresco dining experience. I actually did this wednesday--at least for a while. The temperature kept dropping though and we had to move inside.
Just for the fun of it, you can see my first ever post on the spring flowers in Korea here. Frankly, a much better post than this one.