What is the duration between two different dates and/or times?<p>`start` and `end` can be in various formats, such as:<p>- 11:22:33<p>- 2024-06-01<p>- "2024-06-01 11:22:33"
- 2024-06-01T11:22:33.456Z<p>What is the datetime when adding or subtracting a duration?<p>Duration examples include:
- 5 minutes 5 seconds<p>- 3 weeks 4 days 5 hours<p>- 8 months 7 days 6 hours 5 minutes 4 seconds<p>- 1 year 2 months 3 days 4 hours 5 minutes 6 second 7 milliseconds 8 microseconds 9 nanoseconds