Hi Nagromdark,
Regarding your question about the remaining days, while waiting for a possible native widget: I’m part of the Tempo Calendar team, and we published a small tutorial that sends the number of remaining red and white days in Gladys every Monday, via a free API and without a key: [Tuto] Être prévenu 2 jours avant un jour rouge Tempo (prévisions + jours restants, sans clé API)
If you try it, I’d love to hear your feedback!
Jean-Pierre, from the Tempo Calendar team