In the USA, even full time programmes provide all lectures in the evenings - in common with their part time programmes, so the distinction between the two is blurred. There, programmes often start in Fall, Winter, Spring and Summer. In the USA, perhaps surprisingly, most programmes require applicants to have little or no business experience - quite unlike the norm elsewhere. Perhaps for that reason so called Executive MBA programmes are offered for more experienced managers, usually involving evening or weekend work over 2 years. The diversity and range of provision is far greater in Europe, especially the UK, than anywhere else in the world.
Innovation seems to have been higher here.
You will need more to get into a European and UK MBA - especially more relevant experience but you are less likely to need the GMAT test. The greatest choice is available in Hong Kong and Singapore. There are over 40 programmes available, from 22 providers from 7 countries, for a population of 5.5 million in Hong Kong. In Singapore there are 30 programmes for a population of 2.6 million. Outside these two, the USA and the UK, the greatest provision is in Australia where there are 32 establishments offering over 60 programmes.