Your plan maximum is based on a rolling-year period (e.g. two years for a rolling two-year period, three years for a rolling three-year period, etc.) by service date (the date you received the treatment, service or product being claimed—not the date it was paid for)—not calendar year.
Example:
You can easily track your expenses and view your usage summary through your My ASEBP account or My ASEBP Mobile App.