Some days luck means finding some change under your tire.
Some days luck means perfect dirt.
Some days luck means making a last minute (meaning while already out riding) call to recruit an old friend to ride because the day is just too good to waste.
Some days luck means watching thunderstorms hover around the horizon all afternoon while clear sky seems to hover over whatever trail you're riding.
Some days luck means riding until the last sliver of daylight, racing a thunderstorm home, and actually winning.
On a few rare occasions, all of these things fall on the same day making for an incredible day out and one very lucky day of pedaling.