When it falls

Last Monday of May — computed via Nth-weekday-of-month.

Worked dates:

Year Date
2026 May 25
2030 May 27
2050 May 30

What it shows on the island

From holidays.yml:

Half-mast American flag with poppies.

Sprite

Dimensions: 32 × 32 pixels. Anchored at island position (404, 284).

Added by this port via the holiday expansion. existing_sprite: null. The visual is a 32x32 transparent emblem authored by an AI sub-agent in the shared 16-color CLUT defined in scripts/holidays_art_lib.py. It overlays the island corner during the holiday’s window rather than reskinning the scene.

Palette

 #1A2A5E,  #C8102E,  #FFFFFF

Three-color hint from holidays.yml. This is a guide for the codegen step and the emblem authoring pass; the actual emblem samples from the shared 16-color CLUT, and the original Sierra sprites use the original game palette directly.

Algorithm

Computed by holidayNthWeekdayOfMonth(n, weekday, month, year), which calls holidayDayOfWeek (Tomohiko Sakamoto / Zeller). See Date-algorithm core.

Emblem

This holiday has an emblem on the shared sheet at cell 16, pixel offset (0, 64). View the packed sheet on GitHub: docs/ps1/holidays-emblems/holiday-emblems-sheet.png. Full index: Emblem gallery.

Source