You must define a maximum date in the question advanced settings, else it's set to 2037.
See code:
github.com/LimeSurvey/LimeSurvey/blob/ma...anda_helper.php#L943
github.com/LimeSurvey/LimeSurvey/blob/ma...anda_helper.php#L967
See code:
github.com/LimeSurvey/LimeSurvey/blob/ma...anda_helper.php#L943
github.com/LimeSurvey/LimeSurvey/blob/ma...anda_helper.php#L967