The time flew by theory

People will say time flew by,
1 month, 6 month , 1 year,
When u think it back,
u will feel the time flew by,
u feel like one year are so short.

There is a theory i think,
time didt flew that fast as u think,
time is ticking every second.
no matter how hard u try,
it wont tick twice in a second.
(if u go adjust the clock then u r cheating urself)
time is pass with a sequence speed
but why we think that the time flew by quickly?
the theory for me is the memories of the period in our mind.

What do i mean the memories between that period?
We can do many many things in a year,
but may be wat we can remember is just the importance things.
We remember that we graduate this year,
our birthday this year, new year, christmas,
we will only remember something is really memorable or unforgotten,
but we wont remmeber how many times we eat pan mee in this year,
we wont remember all the details in the year we did,
we wont remember wat things we shop, we eat, we watch,
(ya, ofcoz u purposely try to remind back, u might get it
but there is for sure something we had forgotten.)
With the specific memories, our memories became shorter and lesser.
Just like an hour video and u go and edit it into 1 minute video,
it will be short, important, nothing about detail.

Thats exactly hows my theory is. LOL
Time flew by fast or not is depends how much memories u remember of the year,
more thing u remember, u will found that act time flew slower.
do u agree?