Due
Definition 1 of 5
Pro Tip 1/3
Future Expectations
Use 'due' to express when something is expected to occur, especially officially planned events. Your flight is due to depart at 6 PM.
Pro Tip 2/3
Unplanned Events
'Due' suggests a sense of certainty or schedule, so don't use it for uncertain or unplanned occurrences. Incorrect: The sun is due to shine tomorrow.
Pro Tip 3/3
No Immediate Consequence
'Due to' implies that there's no immediate action required - it's just information. The next billing cycle is due to start on the 15th.