Google Calendar + Spreadsheet

Often convenient data editing and convenient viewing (use) look and work completely differently.

Seeing DTEC graphs (and not only) would be convenient in your calendar, but it is not always convenient to enter these graphs in the calendar interface.
In this case, it is much more convenient and faster to edit information through a table.

We combine and receive:
https://drive.google.com/uc?export=view&id=1aPVe_ms5bHPrzuzQjLZ2uv4z8WBjULgV