[DatePicker|Calendar]: MaxDate property prevents immediate selection of next month date

[PlutaKatarzyna]

Bug Description

When user uses maxDate property, and try to select date of end range month, from previous than max month view, then instead of date being selected (and calendar dropdown being closed), month view is changed and user need to click again on desire date.

Current behavior:

• maxDate is set
• user opens calendar for the month, which is right before the last allowed month (month containing maxDate)
• user clicks at one of the dates from the last allowed month, visible at the last row of the previous month
• date picker stays open and date is not selected

Screen.Recording.2026-09-11.at.14.17.41.mov

Affected Component

Date Picker, Calendar

Expected Behaviour

• maxDate is set
• user opens calendar for the month, which is right before the last allowed month (month containing maxDate)
• user clicks at one of the dates from the last allowed month, visible at the last row of the previous month
• date picker closes and date is selected

Isolated Example

https://ui5.github.io/webcomponents/components/DatePicker/

Steps to Reproduce

• Set maxDate to '2026-12-10'
• open date picker and click on the months switch button to open calendar for November
• click on the 'December, 4' cell visible at the last row of the calendar for November

Log Output, Stack Trace or Screenshots

No response

Priority

Medium

UI5 Web Components Version

2.26.0

Browser

Chrome

Operating System

No response

Additional Context

UDEx ticket https://github.tools.sap/sapudex/digital-design-system/issues/3532

Organization

SAP UDEx

Declaration

• I’m not disclosing any internal or sensitive information.

[PetyaMarkovaBogdanova]

Dear colleagues from @UI5/ui5-team-ctr-bal ,
I reproduced the issue in this sample:
https://ui5.github.io/webcomponents/play/#eNqFUsFu2zAM_RVVpzaIoqRogMFxhm3tditWYN2hgC-KxMRqZcmw5CRGkH8fpdhD2q2bbcDiI_lIPvFAtVWwn5ShMjQ7UCsqoNk5OKbS2QA2IJxfMEZqI7pN41qr2NoZRRj7WNj84u777ePTw1cSkyIQ_8QIu1kWFGxBEYtvXoJQeCb45T50BqIxyqwLl5mCtbagrsgBMaV9LJUR6ywsEDjG_MSf_GvXSFBMOuMaJtRz68OrWJLzgT8aFQRBZCkaDwFb-vn4jX1IXfWuODniWw272jWhoKSfG8GdVqFcKthqCSwZY6KtDloY5qUwsJxNpj1Z0AFr_hBVbSDnJwvH5v3ceFw51ZHUGlKvhHzp1UyTZGQrmkvGvKi__HbdRs_VgpSgNyVOeTOf1vtFX_Avd8LA9vcSA1o9Z0oEYLWWL9BgAdMCxjWViMMpxe_veYcPztyL_o630jYxIT7jM349vZ5GVOwH9IbPezS1xt-Ufq_fU6-4D7LRdSChqyNZ5VRrAAv4RkZTaDt59kiNF5sCk65RzZOufFi9fypCj-OB6mzhB-R82_nonKXUCsiIF1ZXcT9IQSf8zO3bOsKpQVzAP3NTB6_yP6E6fAcr6RCxWNNzlD_wzx5X1LM1BFkOfP9NukOVH5LIpxR6PP4C47dS0g

setting the max-date to : "10/12/2026",
opening the month view for November 2026,
selecting day from December form the last row of November.
Instead of selecting the date the Picker openedthe month view for December.
Please, consider if this is desired behavior or an issue.
Kind regards,
Petya Markova.
UI5 Web Components Dispatcher