posit-dev / posit-dev/py-shiny

ui.input_date() doesn't support years <1000 and >9999

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good first issue
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Python
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Description

Error:

RECV: {"method":"update","data":{"x:shiny.date":"900-02-09"}}
_send_error_response: time data '900-02-09' does not match format '%Y-%m-%d'

Ideally, it would be great to have BC dates as well (year<0).

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing how ui.input_date() parses and formats the submitted date shown in the error, then reproduce the case with year 900 and a year above 9999. Done means supported date values no longer fail with the shown format error, with the intended scope for BC dates clarified before implementation.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
frontend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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