At present, Malaysian children would start their primary education when they reach six plus or seven years of age. The Ministry of Education in Malaysia is now mulling over the possibility to reduce the age for entry into primary education to five plus or six, so as to be inline with other countries in the world.

For more information on the recent development on this matter, do refer to the following news article:

Pros and Cons of schooling at five
Study on Earlier Schooling Decision
Five plus formal schooling plan