This is to set the time according to different rules.
This game works specifically executive functions with the help of semantic memory (long-term) and procedural memory.
Easy level: he works transcoding between different types of apparatus measuring the time with a digital display or needle.
Middle level: he works to understand written instructions and praxis handling a camera, taking account of the day and night.
Difficult level: it aims to develop the correct strategy (concrete guidance through the time zones forward or back to find the equivalent time in another country).