Coordination Calendar – International Gate Control

List
Month

December 2025
December 15

Summer 2026 Series Return Deadline
January 2026
January 31, 2026

Summer 2026 Historics Baseline Date
March 2026
March 29, 2026

Summer 2026 Start of Season
April 2026
April 7, 2026

Winter 2026/2027 Seasonal Communication Date
April 13, 2026

Winter 2026/2027 Slot Historic List Deadline
April 30, 2026

Winter 2026/2027 Agreed Historics Deadline
May 2026
May 7, 2026

Winter 2026/2027 Initial Submission Deadline
May 20, 2026

Winter 2026/2027 Slot Conference Event Platform Customization
May 26, 2026

Winter 2026/2027 SC Event Platform Calendar Opened to Coordinators to request meetings with Airlines
May 28, 2026

Winter 2026/2027 Slot Allocation List Deadline
June 2026
June 1, 2026

Winter 2026/2027 SC Event Platform Calendar Opened to Airlines to request meetings with Coordinators
June 2, 2026

Winter 2026/2027 Deadline for Request for Accommodation