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A calendar of the Artemis programme — what has already happened, and what NASA says is coming. Every row carries three things most timelines leave out: how firm the date is, where it came from, and the day somebody last read that source.

That is not fussiness. Artemis dates move, and they have moved repeatedly — the Moon landing that used to be Artemis III is now Artemis IV, because NASA added a rehearsal flight rather than skip one. A page that printed a target as though it were fixed would be wrong within months and would have misled everybody in the meantime. So nothing here is estimated: where NASA has published only a year, this page prints a year, and where NASA has published nothing at all, it says not set.

Your browser has JavaScript switched off, which is very 1999 of you and entirely fine — the whole calendar is below, in UTC. All the scripting does is add your own local clock and work out what is next.

The middle two columns are the whole point. They mean:

• ✔ confirmed — it happened, or NASA has published a fixed date and time for it.
• ◇ target — NASA's stated aim. Artemis targets move; treat this as an intention, not an appointment.
• ▸ no earlier than — a floor, not a plan. Nothing on the page is one right now, and that is worth knowing too.
• — not set — NASA has not given a date. The row still exists, because "we don't know yet" is a real answer and pretending otherwise is not.

And the dates themselves:

• A row is printed at exactly the precision NASA published. Some are an instant to the minute; some are a day; one is a month, because NASA said "early July" and gave no day; the Artemis III launch is a year, because that is all anyone has said out loud.
• Only rows with a real clock time are converted to your own zone — a coarse date stays in UTC, because sliding "July 2026" into another timezone can name a different month, and that would be a fact this page invented.
• Nothing here is interpolated. No midpoints between two slipped targets, no "probably spring". An empty cell is honest; a guess is not.
• Every row says when its source was last read. If that was more than 180 days ago, the row marks itself stale rather than quietly looking current. Whole catalogue last read end-to-end on 26 August 2026.

Rows that have already happened are dimmed once your browser tells us what day it is, and the next dated thing is outlined. Nothing is hidden: the past is half the story of a programme like this one.

• NASA's Artemis II Crew Set to Receive Congressional Space Medal of Honor — NASA, 21 August 2026
• Houston We Have a Podcast, ep. 434: Artemis III Training (transcript) — NASA, 21 August 2026
• NASA Joins Artemis III Orion Modules; Rocket Hardware Update — NASA, 5 August 2026
• NASA Marches Toward Artemis III Mission in 2027, Names Crew Members — NASA, 9 June 2026
• NASA Outlines Preliminary Artemis III Mission Plans — NASA, 13 May 2026
• NASA Rolls Out Artemis III Moon Rocket Core Stage — NASA, 20 April 2026
• NASA Welcomes Record-Setting Artemis II Moonfarers Back to Earth — NASA, 10 April 2026
• NASA Adds Mission to Artemis Lunar Program, Updates Architecture — NASA, 27 February 2026
• NASA Names Astronauts to Next Moon Mission, First Crew Under Artemis — NASA, 3 April 2023

All of it NASA's own publication of the fact — a press release, the agency's mission blog, or a Johnson Space Center podcast transcript. No aggregators, no wikis, no "as reported by". Where a release gave a local clock time, the conversion to UTC is written on the row that used it.

Elsewhere on the site: the launch schedule for everything else going up this week, and the eclipse desk for the other sky calendar. Dates on this page live in src/data/artemis.ts, one entry per milestone, each with its source and its last-checked day.