Regs for Recent Flight Experience.
Flight review - FAR 61.56
90 Day Currency - FAR 61.57
Flight review
May not act as PIC unless flight review conducted in the last 24 calendar months.
Must have logbook endorsement after completion.
What is needed during flight review?
One hour ground and one hour flight training with cert. flight instructor.
90 Day currency
May not act as PIC with passengers unless within last 90 days you have conducted 3 T/O and landings in same category, class, and type (if necessary).
If at night or in tailwheel A/C then the must be done to a full stop.