The calendar says it's planting time. The day-length does too (we went up to Tahoe for dinner with some friends a week ago, and even though we left after 8 pm we still had enough lingering daylight for the half-hour drive home - albeit through a snowstorm). I've just been waiting for the thermometer to say so too.
Finally, the last couple of days have warmed up enough to start thinking about getting the rest of the garden in. Corn is one of those things that have to wait to be planted until the soil has warmed up enough that the seeds can germinate instead of rot. Since today was my turn to post on the Simple Green Frugal Co-op blog, I wrote here about how I manage to stretch my fresh corn eating time from the end of July until mid-September, with only a short bit of work for me, a short planting time window, in our short high-desert gardening season (speaking of shorts, today was the first day warm enough to wear mine, and the first afternoon I've left the house without carrying a sweater).