That kind of time converter where you could see for example the time currently in your country and the other country.

E.G.
Japan - Korea
8:00 am - 9:00 am
9:00 am - 10:00 am

.....and so on.

Just somewhere along that lines. I used a time converter like that before, but I can't remember the website.

You could just google time zone converter...

These two look ok:
http://www.timeanddate.com/worldclock/converter.html
http://www.timezoneconverter.com/cgi-bin/tzc.tzc

Was there maintenance? I don't see any updates.

I don't use a time converter. I have my watch set to JST (mostly to troll people who keep asking me for the time, considering you can buy a watch for about 1/4 the price of a shit DVD).