Run this audit before a round deadline. SIGMOD research papers are journal submissions to PACMMOD (Proceedings of the ACM on Management of Data), reviewed in year-round batches rather than one annual cutoff, so the first question is always "which round," not "which year." Reopen the live CFP for the cycle you target before trusting any number quoted here.
SIGMOD front-loads part of the deadline: the abstract and the declaration of conflicts of interest are due roughly one week before the paper itself (SIGMOD 2027: the 10th vs. the 17th of the round month, 11:59 PM AoE). Missing the abstract stage closes the round entirely — there is no PDF-only entry.
| Check | SIGMOD 2027 rule (verify per cycle) | Failure mode |
|---|---|---|
| Length | 12 pages max, unlimited pages for references | Desk reject |
| Template | Current ACM template, fonts/margins untouched | Desk reject |
| PACMMOD format | Only for final publication, never for submission | Confused reviewers, chair flag |
| Author identity | No names, affiliations, or funding acknowledgements | Desk reject |
| Colleague thanks | No research-group or collaborator acknowledgements | Anonymity violation |
| Self-references | Third person, no "our prior system" giveaways | Reviewer discount or flag |
| Artifacts | Links must not expose authorship or institution | Anonymity violation |
Note the asymmetry with one-shot conferences: because reviewing is double-anonymous across the full round — including any revision phase — the anonymity discipline must survive months, not weeks. Plan artifact hosting accordingly.
PACMMOD requires substantial novel content and exclusive consideration: once submitted, the paper (or anything with substantial overlap in results) stays out of every other venue until PACMMOD rejects it or you withdraw. Rolling PVLDB submissions of a sibling paper are the classic accidental violation — map the overlap between your group's pipelines before the abstract stage.
D-10 Freeze contribution claims; stop adding experiments
D-9 Abstract, author list, topics, and COIs into CMT
D-7 Anonymity sweep: PDF metadata, repo URLs, funding lines, cluster names
D-5 Rebuild every plot from committed scripts; diff against paper numbers
D-3 Full ACM-template compliance pass; reference pages excluded from count
D-2 Fresh-eyes read of pages 1-2 by someone outside the project
D-1 Upload final PDF; confirm CMT shows the intended file version
D-0 Re-download from CMT and open the PDF you actually submitted
| Round | Abstract + COIs | Paper due | First verdict |
|---|---|---|---|
| 1 | Jan 10, 2026 | Jan 17, 2026 | Apr 19, 2026 |
| 2 | Apr 10, 2026 | Apr 17, 2026 | Jul 19, 2026 |
| 3 | Jul 10, 2026 | Jul 17, 2026 | Oct 19, 2026 |
| 4 | Oct 10, 2026 | Oct 17, 2026 | Jan 19, 2027 |
All cutoffs 11:59 PM AoE. Source:
https://2027.sigmod.org/calls_papers_important_dates.shtml. Future cycles
will shift these dates; treat the pattern (quarterly rounds, abstract a week
early) as the durable part and the dates as perishable.
None of these are recoverable after the round deadline; all of them are findable in an afternoon before it.
SIGMOD ships with PODS, the theory symposium, under one registration and one week — but they are separate venues with separate CFPs, PCs, deadlines, and publication series. Concretely:
[Round verdict] submit this round / hold one round / reroute track
[CMT gate] abstract+COI status, author cap headroom
[Format gate] pages / template / reference handling
[Anonymity gate] pass or the specific leak found
[Overlap gate] PVLDB or other-venue conflicts, embargo exposure
[Ordered fixes] <what to repair before the abstract stage>