To calculate how many hours until a specific future time from the current date and time (Friday, May 09, 2025, 6:36 PM EDT), you need to:

• Determine the target date and time you want to count down to.
• Subtract the current date and time from the target date and time.
• Convert the difference into hours (including fractions if needed).

This process involves straightforward subtraction of datetime values, taking into account days, hours, minutes, and seconds

. For example, if you want to know how many hours until midnight (12:00 AM) tonight, you would:

• Calculate the time from 6:36 PM to 12:00 AM.
• That is 5 hours and 24 minutes, or approximately 5.4 hours

If you want to calculate the hours until a different future date and time, you can use online countdown or time difference calculators that provide the exact hours, minutes, and seconds between two times

. In summary, the number of hours until a future time is the difference between that time and now, expressed in hours. You can do this manually by subtracting times or use online tools for precise calculation.