Who it is for
Anyone who plans around dates and wants to see a month laid out rather than described.
Month and year calendar grids on request
Overview
24/7 Calendar renders a month or a year as a grid inside ChatGPT, in the manner of a wall calendar. Spheric Admin Ltd is the developer.
Requests named in the listing include pulling up the following month, jumping forward to the whole of next year, and displaying the current month with today marked. It answers the kind of date question that is awkward to work out in prose: which day of the week a date lands on, how the weeks line up, how much of the month is left.
It is a viewing tool. The record mentions no events, reminders, or connection to an existing calendar account.
Anyone who plans around dates and wants to see a month laid out rather than described.
It answers date questions visually, which is awkward to do in plain conversation text.
Availability
24/7 Calendar is listed in the ChatGPT apps directory only. Spheric Admin Ltd has no connector under the same domain in the Claude directory; 392 of the 3,150 products here are on both marketplaces, and this is not one of them.
ChatGPT apps are built on MCP, and the same server can back a Claude connector, so the absence is a distribution decision rather than a technical one.
ChatGPT listing
Same company
Runs a connection speed test inside the chat
ChatGPT
Brain training drills run inside ChatGPT
ChatGPT
Recipe lookup rendered as a widget in chat
ChatGPT
Builds and reorders lists inside a ChatGPT conversation
ChatGPT
Nearby
Calendar reads, scheduling and invitation responses in Google Calendar
Claude
HR tasks: colleague lookup, meetings, time off and reviews
Claude
Edit, convert, and combine PDF documents
ChatGPT
Project and task tracking through chat commands
ChatGPT
Destination wedding planning: guests, venues, vendors and budgets
Claude
A unified schedule across every connected calendar, plus tasks
Claude
This is an independent catalogue entry compiled by Node8 from 24/7 Calendar's public marketplace listing as it stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with Spheric Admin Ltd, and inclusion here is not an endorsement.
Node8 builds MCP servers end to end: deciding which tools are worth exposing, the authentication and permission model, the review submissions, and the onboarding that gets them used. One server serves ChatGPT, Claude, and Microsoft Copilot.