Optional ReadonlyexceptionsOptional ReadonlyextendedExtended hours of their own, such as an overnight session, written like
sessions. They open on their own days, except on a date the exceptions
close.
Optional ReadonlypostWhole minutes of post-close trading after each trading date's last regular close, 0 to 1439.
Optional ReadonlypreWhole minutes of pre-open trading before each trading date's first regular opening, 0 to 1439. Counted from the opening, so a shortened day, a special session and a closed date move it with them.
ReadonlysessionsHHMM-HHMM[:days], with opening weekdays 1 (Sunday) through 7.
Local opening dates replace weekly sessions. An empty list closes that date.