Chinese auspicious hour selection / 择时 / 时辰吉凶 / 黄道吉时 / lucky hours / best time of day / 嫁娶吉时

Chinese auspicious hour selection / 择时 / 时辰吉凶 / 黄道吉时 / lucky hours / best time of day / 嫁娶吉时. Returns all 12 shichen (two-hour periods) of a date, each with its 宜 (favorable) / 忌 (taboo) activities and 黄道/黑道 quality. Optional activity param returns the best hours for that activity. Pairs with /almanac/select: which day, then which hour. For AI agents handling event timing, wedding/ceremony hour selection.