In vPlan it is possible to plan a card in your planning board without already having a concrete date. These cards do not have a start or end date and you can therefore include them in your planning board even if your planning date is not yet certain.
Please note that cards without a planning date can only be displayed in the list view and the timeline with the appropriate filter. Cards without a plan date are not visible in the calendar.
If you don't want to give a card a date yet but you do want to include it in your planning board, you can drag it from the backlog into the planning board and then clear the date field.
You do this by simply opening the card and clicking on the start date. Then click on Clear.
As you can see, the card has disappeared from the planning, but it is still visible on the left side without a planning date:
By opening the card, or clicking on the date column, you can still schedule the card and it will reappear in the Plan Board on the chosen date.
You can show or hide unscheduled cards with the vPlan filter at the top right of the application, just turn this button on or off: