Uluru, also known as Ayers Rock, is a popular tourist destination in the Australian Outback. The best time to visit Uluru depends on your preferences, as well as the type of activities you plan to do. Here are some factors to consider:

1. Weather: Uluru has a desert climate, with hot summers and cool winters. The best time to visit in terms of weather is during the cooler months, from May to September. During this time, the days are sunny and warm, with cool nights. The summer months of December to February can be extremely hot, with temperatures reaching over 40°C (104°F) during the day.
2. Crowds: Uluru is a popular tourist destination, and can get very crowded during peak travel seasons. If you prefer to avoid the crowds, it's best to visit during the shoulder seasons of April/May and September/October.
3. Events: Uluru hosts a number of cultural and sporting events throughout the year, including the Uluru Camel Cup and the Uluru Astronomy Weekend. If you're interested in attending one of these events, check the schedule and plan your trip accordingly.

In summary, the best time to travel to Uluru is during the cooler months of May to September if you want to avoid the extreme heat, and during the shoulder seasons of April/May and September/October if you want to avoid the crowds.