... about how time seems to fly.
That weeks, months and years seem to be gone so soon.
Dr.Seuss has written these lines on the topic:
"How did it get so late so soon?
It's night before it's afternoon.
December is here before it's June.
My goodness, how the time has flewn!
How did it get so late so soon?"
The word flewn - last one, fourth line - is not
a typing mistake.
Although the verb fly past form is flew
and its past participle is flown
Dr.Seuss has created the new word in
between so that he could rhyme it with June.