Granted.
We're currently living in the Quaternary Ice Age (ice age being defined as a period when Earth has ice at its poles) so that was easy! Every day you wake up two days back in time (this could get really awkward if you wake up in bed with your past self so I'd suggest you find somewhere unoccupied to sleep). You aren't aging and any awful historical diseases and injuries you acquire, up to and including death, are healed when you wake up two days in the past. This will persist all the way back to the middle of the last
glacial period - look at me being all spirit-of-law-not-word-of-law

. Anyway, that'll be about 63,000 years, so have fun!
I wish someone (not me or anyone I know or care about, thanks) could start slipping backwards in time with Fubaka so he won't get lonely.