We'll take a daily snapshot of your eligible holdings and your monthly interest will be calculated based on the daily average balance. All Voyager interest rates are annual. In order to find the monthly rate you will receive, please make sure to divide the annual rate by 12. 

For example, if you hold 5,000 Voyager Tokens for 15 days of a 30 day month, you will have a monthly average balance of ~2,500 Voyager Tokens and will be paid interest on that accordingly.