In collaboration with the journal "Frontiers in Big Data", we are bringing together a selected group of international experts to contribute to an open-access article collection on: "Big Data Time Series" Guest Editors: Dr. Petros Zerfos, IBM Research (United States), Yorktown Heights, United States Dr. Dimitrios Tsoumakos, Ionian University, Corfu, Greece The submission deadline is 20 December 2020. Visit the collection homepage for the full description of the project: https://www.frontiersin.org/research-topics/14931 Kind Regards, Dimitrios Tsoumakos Topic Editor, Data Mining and Management Section, Frontiers in Big Data On behalf of the Topic Editors.