These dates would work.....
If you are brand new to caching or just moved to Maine and had no finds. As Haffy pointed out, those dates are only really accurate for just the cacher who prepared them. I started caching in December of 04, and as of this morning I have found 1584 caches placed in Maine. My first PQ dates are 05-01-00 thru 09-15-06 and contains 491 active caches. I'm not too worried about being that close to 500 since these are the oldest placed caches in Maine, and they are usually archived and not disabled.
Your dates will vary depending upon how many caches are active in Maine, how many Maine placed caches you have found, and when they were placed.
Why not live life like it is your last day....instead of pretending to be a member of the Peter Pan Club and believing you will be around forever.