To find a relative date, specifically 10 weeks into the future from a given date such as 28th of October, you can manually calculate it by adding 10 weeks to the provided date. In this case, considering there are 7 days in a week, multiplying 10 by 7 gives you 70 days. Adding 70 days to the 28th of October gives you the date 6th of January. This method involves simple multiplication and addition, ensuring accuracy in determining future dates based on a specified timeframe.