When do I need to replace the timing belt pn my Civic

every 60,000 - 90,000 miles

Here is what Honda recommends in the shop manual: Timing Belt Replace at 110,000 miles or 84 months, whichever comes first. If regularly driven in very high (110 degree F, 43 degree C) or very low (-20 degree F, -29 degree C) temperatures replace at 60,000 mile intervals. Zee