Actually you can reset the clock. Under the title screen, press Select+Down+B. The game will prompt you to reset the clock. However, it will require a password which depends on your savegame factors such as name, money, and trainer ID.
This site will tell you how to calculate that password:
http://www.geocities.com/thelegendarydogs/faqs/gsc/time/timereset.htm
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You are not able to reset the clock in Pokémon Crystal. You can only do this in Pokémon Gold/Silver.
If you can trade Pokemon from crystal version to gold version my guess is yes
A fake version of Pokemon gold
Can u trade pokemon between gold version and leaf green
pokemon soul silver/hart gold