To set an analogue Timex watch, pull the side knob out and twist clockwise until the correct time displays on the watch face, then push the knob back in. Digital Timex watches vary widely, and owners can find setting instructions in the instruction manual that came with the watch.
To set the date on an analogue Timex watch, pull the knob to the "middle" position, and turn clockwise until the correct date appears. Do not wear or store the watch with the knob in the middle position, as this damages the internal workings of the watch. You can store the watch with the knob fully "out," which saves battery life. On some analogue Timex watches, the date advances during the hours of 10 p.m. and 2 a.m. Setting the date during this time frame can damage the watch's internal mechanisms.
On analogue Timex watches, the watch should stop ticking when you pull out the side knob, and resume ticking when you push the knob back in. For digital Timex watches, instruction manuals are available online at the Timex website, where they are sorted by model name. Local Timex retailers can assist in setting Timex watches, as can watchmakers and jewelry shops.