Event lists are standardized lists of times when an "event" of a given character occur or time spans when some condition is true. Lists may catalog times of magnetopause crossings, solar flares, CMEs, and other events. Event lists can be registered in SPASE-Group.org as "Catalogue Resources" with a corresponding schema. SPASE has standardized formats for ASCII table and VOTable versions of the lists. The format is very simple, consisting of a list of event begin and end times along with optional associated parameters, all forming one table with a header that states what the entries in the table are. Most event lists are in one of several SPASE formats: Heliophysics Event List (HPE) format or in VOtable format also described at https://hpde.gsfc.nasa.gov/HPEvent_List_Specification.pdf and https://spase-group.org/docs/conventions/HDMC-Event-List-Specification-v1.0.4.pdf SPDF is developing an event list service, following the efforts of the old HELM project.