Mid-Autumn weekend booking — 2027 example
Bao Thien Ngo · cPALSs Festivals Chair · August 2026
This is a worked example of the Mid-Autumn weekend booking decision engine for Greater Sacramento — Mid-Autumn Season 2027. Other hosts can steal the structure even if their venue inventory looks different.
Venue still open for this season — Derr-Okamoto Park is a candidate, not a lock; Laguna Town Hall (prior Mid-Autumn home) is back in the compare. See venue factors.
Live calendar: Autumn market landscape · Autumn market research · Season coordination
Holiday anchor
| Mid-Autumn Day | Wednesday, September 15, 2027 |
| Rule | 15th day of lunar month 8 |
| Product shape (this example) | Saturday only · public 2:30–9:30 PM (7 h) · procession @ civil dusk |
Park weekends (Cosumnes CSD) book about 365 days out. Candidate Saturdays open from ~September 4, 2026 onward — ask inventory before early September 2026.
Candidate Saturdays (moon-relative −2…+2)
anchor_sat = first Saturday on/after Mid-Autumn Day = Sep 18, 2027.
| Label | Rel | Saturday | vs moon (Wed 15) | ~365-day open |
|---|---|---|---|---|
| Week −2 | −2 | Sep 4, 2027 | 11 days before | ~Sep 4, 2026 |
| Week −1 | −1 | Sep 11, 2027 | 4 days before | ~Sep 11, 2026 |
| Week 0 | 0 | Sep 18, 2027 | 3 days after | ~Sep 18, 2026 |
| Week +1 | +1 | Sep 25, 2027 | 10 days after | ~Sep 25, 2026 |
| Week +2 | +2 | Oct 2, 2027 | 17 days after | ~Oct 2, 2026 |
Expect inventory to leave about four practical Saturdays after the park says which are free.
Soft-rank snapshot (provisional)
Community collisions (2026 pattern → 2027)
From the 2026 autumn landscape (moon-relative to Fri Sep 25 / Sat Sep 26):
| Rel | 2026 | What landed |
|---|---|---|
| −1 | Sep 19 | Densest cluster — CAAPS Sat · CAIMH Sun · campus Mon · parish est. |
| 0 | Sep 26 | Lunar weekend largely open for a park-scale family fair |
| +1 | Oct 3 | Giant Pumpkin Festival (~75K ‡ claim) + early-Oct plaza Mid-Autumn |
Peers may move in 2027 — refresh when flyers post.
School / holiday
EGUSD traditionally starts mid-August — by early September families are weeks in. Sat Sep 4, 2027 = Labor Day weekend (Mon Sep 6) — treat as holiday travel. UC Davis / VSA metro presence before instruction is unknown — do not score it as upside.
Rain vs heat
Sep–early Oct Sac wet-weekend rates ~0–6% — rain is a wash. Hourly means show peak heat ~4 PM; Sep 4 is the heat outlier (~90°F mean at 4 PM). Lantern hours are workable on all five.
Daylight (Elk Grove area)
Civil dusk ~7:58 PM (Sep 4) → 7:13 PM (Oct 2). Inside a fixed 2:30–9:30 public window, post-dusk lantern time grows from ~1.5 h to ~2.3 h.
Provisional recommendation
Prefer Saturday, September 18, 2027 (week 0) — best moon proximity, clearest of the 2026-style −1 cluster and of Giant Pumpkin weekend, no Labor Day, cooler mid-Sep afternoon than early September.
| Rank | Saturday | Why |
|---|---|---|
| 1 | Sep 18 | Recommend |
| 2 | Sep 11 | Alt if inventory kills Sep 18 — watch peer re-cluster |
| Avoid | Sep 4 | Labor Day + hottest afternoon |
| Avoid | Sep 25 | GPF same-city weekend risk |
| Fallback | Oct 2 | Cooler / quieter · weak moon |
Next after date lean: pick the site (Derr-Okamoto vs Laguna Town Hall vs other) using venue factors, then confirm that facility’s inventory for the preferred Saturday.
Method
Full reusable playbook: Mid-Autumn weekend booking — decision engine.