Please change 'which primarily Muslim countries' to '... country', as East and West Pakistan was then a single country (Pakistan). East Pakistan only then separated to become Bangladesh in 1972.
Fun fact: The expression that 'the sun never sets' on the British Empire was actually first used for the Spanish colonial empire a few centuries back. It was then popularised by the British Empire, because the Sun always shone on British territory at any time of day. That could also be said for the French colonial empire. In fact, even today, the Sun still shines on British territory at any time of day (look it up!). The same goes for French territory!