Christmas is giving time, why all restaurant increase price?

YES.You are right.They do like that.Because at that time people need some place to hang out with friends and the resturants are the only source for them. so they increase their price at that time..Even if in some cafe the normal coffee which costs 1$ in normal season,they increase the price upto 3$-4$.

yeah i dont like to see too,maybe this the part of business,but should be fixed next yera coz christmas is true is giving time,love and peace, alot people cant eat out there.;(

they want money

Because the demend is high thats why.