Daily challenges — October 2026

• 20 October 2026 — Waterways — Bolivia
• 21 October 2026 — Greek phone zones
• 22 October 2026 — German states
• 23 October 2026 — Spanish phone zones
• 24 October 2026 — Jersey parishes
• 25 October 2026 — Waterways — Poland
• 26 October 2026 — Waterways — Romania
• 27 October 2026 — French regions
• 28 October 2026 — The Schengen Area
• 29 October 2026 — Guatemalan postal codes
• 30 October 2026 — Kyrgyz regions
• 31 October 2026 — Chilean regions