The 2027 CS Conference Calendar: Clusters and Clashes

Most conference planning happens one conference at a time: a deadline appears, you submit, and if it lands you work out the travel. Looking at a whole year at once shows things that the one-at-a-time view hides, and 2027 has some unusually sharp examples.

We track conference editions by city, venue and date, so we ran our own 2027 data. 113 editions are announced so far, 112 of them placed in a city and 105 with confirmed dates, including 35 CORE A* conferences and 31 A.

One caveat up front, because it changes how you should read everything below.

This is a snapshot, not a full year

Here is the month distribution of the 105 dated 2027 editions we hold:

Jan   6  ######
Feb  14  ##############
Mar  19  ###################
Apr  14  ##############
May  15  ###############
Jun  18  ##################
Jul  12  ############
Aug   6  ######
Sep   0
Oct   1  #
Nov   0
Dec   0

September to December 2027 is essentially empty. That is not a real gap in the field’s calendar. It is an artefact of announcement lead times: conferences typically confirm dates 12 to 18 months out, so as of August 2026 the second half of 2027 has largely not been announced yet.

This matters because it makes any “2027 trend” claim untrustworthy. Our data shows North America up about six points on 2026 as a share of placed editions, but autumn is exactly when Asia-Pacific hosting clusters, so that shift is almost certainly a measurement artefact rather than a real move. We are not going to make that claim, and you should be sceptical of anyone who does with the same data. What follows is only about what is already fixed.

Four A* conferences, one hotel, one week

The single most striking thing in the 2027 data is Atlanta in June.

PLDI, ISCA and STOC all run 5 to 11 June 2027, with SIGMETRICS from 7 to 11 June. All four are CORE A*. All four are at the Hyatt Regency Atlanta.

That is the Federated Computing Research Conference, which the ACM runs roughly every four years to co-locate a large set of otherwise separate conferences. It is the reason programming languages, computer architecture, theory and performance measurement all land in the same building in the same week.

The practical consequence is unusual. These four communities normally never overlap, and a researcher who works across two of them would normally pay for two trips. In 2027 that is one flight, one hotel, one week. If your work sits between theory and systems, or between languages and architecture, this is the cheapest year in four to attend both sides. e-Energy is also expected at FCRC but has not published dates yet.

Salt Lake City does the same thing in March

Less famous but structurally identical: 20 to 24 March 2027 in Salt Lake City holds four co-located conferences on exactly the same dates.

HPCA (A*), CGO (A), PPoPP (B) and CC (B) run as a single combined event. That is the annual architecture-and-compilers week, and it covers hardware architecture, code generation, parallel programming and compiler construction in one registration. The joint venue has not been announced yet.

Valletta does a smaller version in February: ICAART on 23 to 25 February, then VISAPP and VISIGRAPP from 26 to 28. Consecutive rather than concurrent, so a single week in Malta covers all three.

Dublin: two A* conferences, nine days apart

Not co-located, but close enough to matter. ICSE runs 25 April to 1 May at the Convention Centre Dublin, with MSR inside it on 26 to 27 April at the same venue. Then The Web Conference arrives in the same city on 10 to 14 May.

That leaves a nine-day gap between two A* conferences in one city. For anyone travelling to Dublin from outside Europe, staying through is likely cheaper than flying home and returning, and the gap is long enough to be a working week rather than dead time.

Barcelona has a looser version: MWC on 1 to 4 March and KubeCon Europe on 15 to 18 March, eleven days apart.

The week of 10 May is the year’s worst collision

Five top-tier conferences start in the same week, in five different cities on two continents:

CHI and The Web Conference are the painful pair: both A*, both running Monday to Friday of the same week, one in Pennsylvania and one in Ireland. There is no version of that week where you attend both. If you have papers in submission to both, it is worth knowing now rather than in April.

Three other weeks carry four apiece:

• 21 June: FAccT Porto, LICS Montreal, DSN Berlin, ICAPS Columbia
• 5 July: ICALP Krakow, RSS Athens, OSDI Baltimore, DAC San Jose
• 12 July: AsiaCCS Macau, FSE Shenzhen, ICME Xiamen, ISMB Copenhagen

That July week is the interesting one, because three of the four are in southern China. Macau and Shenzhen are 65 km apart, so AsiaCCS and FSE are genuinely combinable despite being separate conferences in separate jurisdictions. Xiamen is 529 km further up the coast, so ICME is not.

Cities worth watching rather than combining

Several cities host multiple 2027 conferences far enough apart that they are not one trip, but they are worth knowing if you have a reason to be there anyway. San Jose takes NVIDIA GTC in March, DAC in July and KDD in August, the last two in the same convention centre three weeks apart. Copenhagen has ETAPS and TACAS in April, ICDE in May and ISMB in July. Las Vegas runs CES in January and finishes with Black Hat from 31 July to 5 August rolling straight into DEF CON on 5 to 8 August, which is one nine-day trip if you do both.

What to do with this

Three things are actionable now.

If you work anywhere near programming languages, architecture or theory, June 2027 in Atlanta is a genuinely unusual opportunity and the host hotel will fill early for a reason. If you submit to both CHI and The Web Conference, the week of 10 May forces a choice and it is better made deliberately. And if you are planning a European trip around ICSE, the Dublin gap to The Web Conference is worth pricing before you book a return flight.

For everything after August 2027, check back. The autumn conferences will announce over the next six months, and that is when the year’s real shape becomes visible. We update these pages as dates are confirmed, and the full conference listing always reflects what is currently known.