AI OnAI Off
Please try chagning the time settings in the control panel. May be this will solve your issue
I think it's hardcoded in InputDate.CreateChildControls()
if ((this._initialValue != DateTime.MinValue) && (this._initialValue != DateTime.MaxValue)) { this._input.Text = this._initialValue.ToString("yyyy-MM-dd HH:mm"); }
EPiServer:InputDate control ignores current culture settings and works only with Sweden date format YYYY-MM-DD