Summer time

Have you heard about 'Summer time'?
This  is a  system that makes our clock an hour earlyer.
For example, if it is 1 p.m. our clock should be 12 o' clock (noon).

This system was argued by science that we should wake up early and sleep early so we can save our light and also because we can have a lot of  sunlight so we can be healthy.

Summer time was first used by German during World War 1 and summer time system spread to other countries.

But now because it is uncomfortable many countries do not use summer time system.
Our country used summer time system when we had Seoul Olympic.
But now our country dosen't use it any more.

Do you want to use summer time system?