Oct. 29, 2024 Get Ready for TRICARE Open Season and 2025 Region Changes at Nov. 14 Webinar Are you ready for TRICARE Open Season and the upcoming changes to TRICARE in 2025? Mark your calendar for a TRICARE webinar, “Get Ready for TRICARE Open Season and 2025 Region Changes,” on Thursday, Nov. 14, 2–3 p.m. ET on Microsoft Teams Live.