End of the year grief

Today is my kids last day of school and I had a moment looking back and I started crying. I realized my oldest will be graduating from high school in 10 years! My youngest is no longer a baby and will be in his last year of preschool. It just hit me harder than I expected. Sometimes I wish time would remain constant or at the very least I wish to slow down time and savor the moment longer with them.

How do you dads handle this grief?