4 ms·
The unit of 'month' is not fixed. It doesn't even have a value until it's applied to a date. (It is almost like a quantum state. It can be between 28 and 31 da
by underwater 5y ago
The unit of 'month' is not fixed. It doesn't even have a value until it's applied to a date.
(It is almost like a quantum state. It can be between 28 and 31 days, depending on what it's being applied to. But as soon as it's applied to an absolute date the ambiguity disappears).
If you expand out the short hand 2000-02-02 + (1 month forward from February) + (1 month forward from March), then we can see associativing is nonsensical.