Abstract: Systems and methods for scheduling and calendaring are provided in various embodiments. Systems, methods and software for accessing two or more electronic or online calendars for scheduling systems to allow for efficient identification and collection of available times and dates, without accessing or using any private or other information from the calendars. Systems, methods and software to also collect available times across multiple calendars, identify available overlapping open times and produce a set of available times and dates for an event across the various calendars, with then the option to schedule the event during one of the available times. Secure multiparty computation is applied to maintain privacy and security while allowing for the access, identification and collection of open times across each of various calendars or scheduling systems.