Most jiaos extend for a period consisting of an odd number of days, such as a one-day jiao, a three-day jiao, five-day jiao, seven-day jiao or the so-called luotian da jiao, which goes on for 49 days.
舉辦的時間以奇數為主，依天數稱為一朝醮、三朝醮、五朝醮、七朝醮，乃至於七七四十九天的「羅天大醮」。