Two things:
- flying VFR, GPS is a secondary navigational aid, not a primary and usually you update databases one time a year at ARC maintenance,
- flying IFR you have to follow the 28 days update cycle.
So, if you rent an IFR certified plane for IFR RNAV flights, the database should be current, if you rent a VFR plane, be lucky for a moving map database less than 12 month old. If you feel it as too old at a VFR flight, you have to read GPS position and look at the paper chart ...