Simple example. Obsidian lets you author *generic* lists, but Solenoid Properties plugin extends those choices to all Solenoid socket types. Here I author a Date list, import into Solenoid, and use INDEX + DAYS to get the time span between em.
I can't believe I didn't have this idea before releasing 1.4. Put parts of Solenoid inside an Obsidian plugin!! The Solenoid Properties plugin will let you build Solenoid objects (lists, tables, frames, cubes) directly inside Obsidian properties view for later piping into Solenoid!