According to ISU Regulations, Rule 104 paragraph 14.a), you will find in the ISU Communication 2189 here on the right, the list of International Speed Skating and Short Track Speed Skating Competitions for the season 2018/19.
This Communication does not replace announcements according to Rule 112.
The latest version of the calendar will also be published on the ISU Internet website and can be accessed here: www.isu.org