The "/technoteedit" page:

Revise or create a technical note (formerly called an "event").

Required query parameter:

name=ID

Hex hash ID of the technote. If omitted, a new tech-note is created.

POST parameters from the "Cancel", "Preview", or "Submit" buttons:

w=TEXT

Complete text of the technote.

t=TEXT

Time of the technote on the timeline (ISO 8601)

c=TEXT

Timeline comment

g=TEXT

Tags associated with this technote

mimetype=TEXT

Mimetype for w= text

newclr

Use a background color

clr=TEXT

Background color to use if newclr

For GET requests, when editing an existing technote newclr and clr are implied if a custom color has been set on the previous version of the technote.