When is the recommended change for a timing belt change?

manufacturers recommend 60,000 miles or 100,000klm
dusty operating conditions or high speed work reduce the period before changes
To get the best out of a new belt, it is recommended to also change crank and cam shaft seals , all idler pulleys and hydraulic belt adjusters
oil is the biggest destroyer of timing belts

Kia recommends ( california) checking at 60,000miles and 90,000miles and changing at 105,000miles
all other states and up to 2009 kia recommends replacement every 60,000miles
models from 2010 recommends every 60,000 miles or 72 months which ever occurs first
the timing belt is subject to dust ,age , grime and oil from cam, crank and hydraulic tension leaks so It would be advisable to consider changing it
rubber ages and cracks and a check by an accredited service shop would be a prudent move and if it is recommended to change the belt consider the advice

The timing belt is one of life's awkward mysteries. Timing belts are designed to last the life of the car. They are near impossible to predict when they will snap as they generally offer no warnings. There is no wear indicator on a timing belt and their construction is such that it is nearly impossible to know if they are worn or close to failing.It is for this reason that manufacturer's still recommend changing them periodically, 'just in case' the worst happens.It's also because the timing belt has tensioners which run on bearings, and these bearings, as with all bearings on a car, wear out at a certain point.From my experience with cars in general, I would personally recommend a change of belt, tensioner and any other bearing pulleys at around 50,000 miles, "around" being the word, as some cars sit in traffic a lot and tend to manage fewer miles before requiring attention.
Unfortunately as I have no experience with your specific model of car, I will have to leave others to instruct you on how to change the belt on that specific model. Timing belt replacement, although generally requiring the same or similar methods of replacement can vary a little from time to time, and as there is sometimes an element of risk when changing the belt (note: Interference type engines), I would recommend leaving it to the pro's if you are not handy with cars yourself, or aren't familiar with this procedure.
By the way, when changing the belt, it is often pertinent to swap out the water pump at the same time if yours is also driven by the timing belt, as it likely will be.
Changing the belt can be a time consuming task, and slightly frustrating for some, depending largely on the vehicle at hand.
Garages charge quite a sum for this, and so if the water pump fails int eh future, it will all have to be done yet again. And so, I recommend simply replacing the water pump at the same time anyway, as it can save money and time in the long run.

Cam belt is also know as timing belt.
The manufacture recommended change interval is 95,000 miles.

Today T-Belt is also drive the water pump.
I strongly recommend you to change the water pump,T-belt,tensioner,and plastic guide at the same time.
Check for any sign of freeze plug leak on the block while you servicing the belt.

Mos of the dealers recommend the timing belt change between 60000miles up to 105000miles.
Toyota recommend the timing belt change at 100000miles.

60,000 miles is the typical recommended interval for timing belt replacement. The belt can become worn and skip a tooth or even break. In that event, the pistons can collide with the valves and cause a considerable (and expensive) amount of damage. Changing the timing belt at recommended intervals is good insurance to protect against valvetrain and piston damage due to belt failure.

100 000kms is a recomended change time for many vehicles.

my automatic transmission light doesn't turn on when you turn the headlights on. Can't see what gear its in at night.

60k

Normally with a timing belt its recommended that you change the belt at 60,000 mile. If its a chain at 100,00 miles.