If you center the seasons on the equinoxes and solstices, summer starts around may 10th. Simplified to months (as it often is), spring will end on may 31. June is very clearly summer, and is one of the hottest months of the year. If June was spring, then August would be summer, and November would be autumn. None of those 3 make sense to me.
I suppose they could fudge it a month anyway, but I expect them to have an exact date soon, which will end this discussion rather quickly.
As it is, my conservative estimate is still may 31.
Edit: just noticed the offical date....D'oh
yeah here in aus months dictate seasons not dates.
dec-feb = summer
march-may = autumn
jun-aug = winter
sep-nov = spring
so if they mean our spring your all stuffed
side not, queensland only has two seasons practically. "summer" and "not quite summer" which occur between nov-april, and may-oct respectively.
In the southern hemisphere, the seasons are the opposite of what they are in the northern hemisphere. The UK, where Splash damage is located, is obviously in the northern hemisphere.