Brussels is 6 hours behind Kuala Lumpur
Best overlap: 2:00 PM to 6:00 PM in Kuala Lumpur is 8:00 AM to 12:00 PM in Brussels.
Shoot for 2:00 PM to 6:00 PM in Kuala Lumpur; your Brussels colleagues will see that as 8:00 AM to 12:00 PM. A 4-hour overlap gives you a workable daily window; aim for earlier in it to avoid clipping the end of someone's day. Don't be caught out by clock changes — Brussels observes daylight saving and Kuala Lumpur doesn't, so the offset varies by an hour through the year.