A decade ago now, I flew home (~5000nm) to a year 7, 50th year class reunion...ie 2013 (no wives or gfs allowed ).
It was a long haul from Hong Kong back then but was forceably talked into it.
So we were all, that night 63 years old.
Thank goodness for name tags, but as other have commented, apart from being a bit grayer,balding and/or slightly overweight (me only graying ) I could recognize most of the (remaining....a few MIA) guys, but the "girls" were a bit more challenging !
One or two of those, we, as 12yo boys, had lusted over back then had degraded to the 3/10 category, and one or two who had been quiet and sheepishly, reserved were now raging.
Quite a shock and an eye opener
But overall a great experience and well worth the journey.
It'll probably never happen again as we are all now in our seventies, but glad it did for we baby boomers back in 2013