In the twenty first century, multicultural teams in different time zones working on the same project are common practice. This is due to the growth of outsourcing, especially if teams are working on a software product that needs to conquer the global marketplace, or you want to boost productivity by having someone working on the project 24/7.
Multicultural and different time zone teams can have various differences, such as work preference, language, different work approach practices, and so on. Redmine can help boost the productivity of international teams in different ways. One good practice would be to create a document with rules and instructions on what the project collaboration process should look like. Also, make sure that everyone is informed of such a document and follows the rules explained there.