How to figure out which parts of the date were not provided?

[roma-glushko]

Hey thanks for the great library!

I would like to see if there is a reliable way to figure out which parts of the date were not provided directly in the input string but rather inferred?

For example,

• the input string was May 13th, so I would like to know that month/day was provided while year was missed.
• the input string was 1997, so I would like to know that month/day were missed and only year was provided.

I believe Period was supposed to be the answer, but it gives me Day for May 13th meaning that it's confident in year -> month -> day? But it can't be confident in year in this case as it was not provided.

Another question: is it possible to figure that which parsed date was relative? E.g. last week, yesterday, in 3 days, etc.

My use cases are a bunch of little functionalities around scheduling/reminding:

• If someone wants to record May 13th as someone's birthday, then we shouldn't show how old that person is since we don't know the year they were born.
• If relative date was provided, we need to "fix" it in time by turning into an exact timestamp vs keeping incomplete absolute dates as is.