Wrong date calculation for orders starting before begin of the daily plan period

Current Situation

• The Daily Plan calculates wrong start dates if
  • the begin of the Daily Plan period is after midnight and
  • the start time of an order specifies a time before the begin of the Daily Plan period.

Example

• Assuming the begin of the Daily Plan period for: 18:00
  • the error does occur with an order start time 17:00
  • the error does not occur with an order start time 19:00

Desired Behavior

• Daily Plan dates should be accurately calculated for Daily Plan settings that include a begin of the Daily Plan period different from midnight.