Daily Plan is not showing all scheduled dates

Current Situation:

• In the Daily Plan view the highlighted dates are not showing all scheduled dates.

Steps to Reproduce:

• Change the default time zone in the Profile, in the Schedule, and in the Settings for the Daily Plan to America/Montevideo.
• In the Settings page set the days_ahead_plan option to 30 days.
• Create a workflow, calendar and schedule.
• In the calendar, select the "working day" calendar type, and add a frequency, for example select weekdays as "every day" and "valid from" 1st June and release the calendar.
• In the Daily Plan view, the scheduled date is displayed from 1st June to 29th June, but the 30 June is not getting selected.

Note: In the Calendars view, the "valid from" date is also changed.

Desired Behavior:

• The Daily Plan view should display the exact scheduled sates and the Calendar view should show the correct "valid from" date.