This Python script reads an org agenda file (i.e. a regular org file with some active dates) and displays an interactive and colored year calendar with detailed information for each day when the mouse hovers a specific date. Else, it shows event for the current week.

./agenda agenda.org --holidays France

pip install orgparse  # See https://github.com/karlicoss/orgparse
pip install holidays  # See https://github.com/dr-prodigy/python-holidays