caldav-calendar

Original：🇺🇸 English
Translated

Sync and query CalDAV calendars (iCloud, Google, Fastmail, Nextcloud, etc.) using vdirsyncer + khal. Works on Linux.

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Sourcesundial-org/awesome-openclaw-skills
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NPX Install

npx skill4agent add sundial-org/awesome-openclaw-skills caldav-calendar

Tags

Translated version includes tags in frontmatter
calendars-synckhal-guidevdirsyncer-setuplinux-productivitycaldav-management

SKILL.md Content

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CalDAV Calendar (vdirsyncer + khal)

vdirsyncer syncs CalDAV calendars to local 
.ics
files. khal reads and writes them.

Sync First

Always sync before querying or after making changes:
bash
vdirsyncer sync

View Events

bash
khal list                        # Today
khal list today 7d               # Next 7 days
khal list tomorrow               # Tomorrow
khal list 2026-01-15 2026-01-20  # Date range
khal list -a Work today          # Specific calendar

Search

bash
khal search "meeting"
khal search "dentist" --format "{start-date} {title}"

Create Events

bash
khal new 2026-01-15 10:00 11:00 "Meeting title"
khal new 2026-01-15 "All day event"
khal new tomorrow 14:00 15:30 "Call" -a Work
khal new 2026-01-15 10:00 11:00 "With notes" :: Description goes here
After creating, sync to push changes:
bash
vdirsyncer sync

Edit Events (interactive)

khal edit
is interactive — requires a TTY. Use tmux if automating:
bash
khal edit "search term"
khal edit -a CalendarName "search term"
khal edit --show-past "old event"
Menu options:
  • s
    → edit summary
  • d
    → edit description
  • t
    → edit datetime range
  • l
    → edit location
  • D
    → delete event
  • n
    → skip (save changes, next match)
  • q
    → quit
After editing, sync:
bash
vdirsyncer sync

Delete Events

Use 
khal edit
, then press 
D
to delete.

Output Formats

For scripting:
bash
khal list --format "{start-date} {start-time}-{end-time} {title}" today 7d
khal list --format "{uid} | {title} | {calendar}" today
Placeholders: 
{title}
, 
{description}
, 
{start}
, 
{end}
, 
{start-date}
, 
{start-time}
, 
{end-date}
, 
{end-time}
, 
{location}
, 
{calendar}
, 
{uid}

Caching

khal caches events in 
~/.local/share/khal/khal.db
. If data looks stale after syncing:
bash
rm ~/.local/share/khal/khal.db

Initial Setup

1. Configure vdirsyncer (
~/.config/vdirsyncer/config
)

Example for iCloud:
ini
[general]
status_path = "~/.local/share/vdirsyncer/status/"

[pair icloud_calendar]
a = "icloud_remote"
b = "icloud_local"
collections = ["from a", "from b"]
conflict_resolution = "a wins"

[storage icloud_remote]
type = "caldav"
url = "https://caldav.icloud.com/"
username = "your@icloud.com"
password.fetch = ["command", "cat", "~/.config/vdirsyncer/icloud_password"]

[storage icloud_local]
type = "filesystem"
path = "~/.local/share/vdirsyncer/calendars/"
fileext = ".ics"
Provider URLs:
  • iCloud: 
    https://caldav.icloud.com/
  • Google: Use 
    google_calendar
    storage type
  • Fastmail: 
    https://caldav.fastmail.com/dav/calendars/user/EMAIL/
  • Nextcloud: 
    https://YOUR.CLOUD/remote.php/dav/calendars/USERNAME/

2. Configure khal (
~/.config/khal/config
)

ini
[calendars]
[[my_calendars]]
path = ~/.local/share/vdirsyncer/calendars/*
type = discover

[default]
default_calendar = Home
highlight_event_days = True

[locale]
timeformat = %H:%M
dateformat = %Y-%m-%d

3. Discover and sync

bash
vdirsyncer discover   # First time only
vdirsyncer sync