"Obama's first 100 days."
Seems we've been hearing this phrase for a long, long time. So I searched the Los Angeles Times archives for the exact phrase. The earliest usage I found was on January 20.
So we've been talking about Obama's first 100 days for 99 days now.
Causes June Casagrande Supports
Planned Parenthood, ClimateCrisis.net, the Richard Dawkins Foundation, Pet Orphans of Southern California, KIVA