In Jain time, a pahar (prahar) is a fixed block of time. If you’re counting from a reference point like sunrise, 1 prahar is about 3 hours (there are 8 prahars in a full day-night cycle: 4 for the day and 4 for the night). So “23 pahar after the period” means 23 prahars after that reference moment, which is not within a single day. It spans into the next day (roughly 69 hours after the reference point), i.e. well into the third day after sunrise. Such a long span is not a standard or practical Jain timing marker for daily observances.

If you’d like, I can outline how the usual daily divisions (pahar, muhurt, etc.) are used for common Jain practices like meal times and rituals. You can read more about how day and night are calculated in Jainism here and about porsi timings here