Why does Adaptive Card Input.Date subtract 1 day from the selected date? - date

Question

Using botframework with msteams channel.
The adaptive card. Nothing special, just a few textblocks and date inputs. The input values are saved to memory.
{
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"type": "AdaptiveCard",
"version": "1.3",
"body": [
{
"type": "ColumnSet",
"columns": [
{
"type": "Column",
"style": "emphasis",
"width": 2,
"items": [
{
"type": "TextBlock",
"text": "Please enter the information below",
"size": "Large"
},
{
"type": "Container",
"style": "emphasis",
"items": [
{
"type": "TextBlock",
"text": "End Of Last Month",
"wrap": true
},
{
"type": "Input.Date",
"id": "Date_EndOfLastMonth",
"value": "${dialog.requestForm.Date_EndOfLastMonth}",
"placeholder": ""
},
{
"type": "TextBlock",
"text": "${dialog.requestForm.Date_EndOfLastMonthError}",
"size": "small",
"wrap": true,
"color": "attention"
}
]
},
{
"type": "Container",
"style": "emphasis",
"items": [
{
"type": "TextBlock",
"text": "End Of Last Year",
"wrap": true
},
{
"type": "Input.Date",
"id": "Date_EndOfLastYear",
"value": "${dialog.requestForm.Date_EndOfLastYear}",
"placeholder": ""
},
{
"type": "TextBlock",
"text": "${dialog.requestForm.Date_EndOfLastYearError}",
"size": "small",
"wrap": true,
"color": "attention"
}
]
},
{
"type": "Container",
"style": "emphasis",
"items": [
{
"type": "TextBlock",
"text": "Valuation Key Date",
"wrap": true
},
{
"type": "Input.Date",
"id": "ValuationKeyDate",
"value": "${dialog.requestForm.ValuationKeyDate}",
"placeholder": ""
},
{
"type": "TextBlock",
"text": "${dialog.requestForm.ValuationKeyDateError}",
"size": "small",
"wrap": true,
"color": "attention"
}
]
},
{
"type": "Container",
"style": "emphasis",
"items": [
{
"type": "ActionSet",
"actions": [
{
"type": "Action.Submit",
"title": "Submit",
"data": {
"msteams": {
"type": "messageBack",
"displayText": "Form Submitted",
"text": "submitform"
}
}
}
]
}
]
}
]
}
]
}
]
}
The code that goes with the card. I save the input values to memory, so when there is a reprompt happening, I can fill them back to the form. In the last part are the lines for debugging. I am printing out the values directly from the activity, so nothing happens between the submission and the debug.
new CodeAction(async (dc, options) =>
{
dc.State.SetValue("dialog.requestForm.Date_EndOfLastMonth", "");
dc.State.SetValue("dialog.requestForm.Date_EndOfLastYear", "");
dc.State.SetValue("dialog.requestForm.ValuationKeyDate", ""); //ValuationKeyDate
dc.State.SetValue("dialog.requestForm.Date_EndOfLastMonthError", "");
dc.State.SetValue("dialog.requestForm.Date_EndOfLastYearError", "");
dc.State.SetValue("dialog.requestForm.ValuationKeyDateError", "");
return await dc.EndDialogAsync();
}),
new TextInput()
{
Id = "repromptTRT",
Prompt = new ActivityTemplate("${TreasuryCase()}"),
AllowInterruptions = true,
MaxTurnCount = "if(turn.activity.text != 'submitform', '0', '100')",
},
// deal with interrupt, cancel everything else
new IfCondition()
{
Condition = "turn.activity.text != 'submitform'",
Actions = new List<Dialog>()
{
new EndDialog()
}
},
// save form
new CodeAction(async (dc, options) =>
{
var json = JsonConvert.SerializeObject(dc.Context.Activity.Value);
await dc.Context.SendActivityAsync(MessageFactory.Text(json));
var d = JsonConvert.SerializeObject(DateTime.Now);
await dc.Context.SendActivityAsync(MessageFactory.Text(d));
var o = JsonConvert.DeserializeObject<TC>(json);
dc.State.SetValue("dialog.requestForm", o);
return await dc.EndDialogAsync();
}),

Answer 1

For more visibility, adding answer here from comment section:
The fix should be rolling through the rings, so the change should manifest in public clients in a couple of weeks.