confusing error messages

[nus-pe-bot]

The error message does not specify whether the error is due to incorrect date format or whether the dates are in the past or future, which is confusing to new users, especially if they are inputting multiple dates at once and are unsure of the proper formatting.

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_{[original: nus-cs2103-AY2324S2/pe-interim#1698] [original labels: type.FunctionalityBug severity.Low]}

[tanyunchao]

Team's Response

thanks

Duplicate status (if any):

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