Eastern Culture
Da Yun (大运) is the ten-year luck pillar cycle in BaZi: not your birth chart, not today's flow day, and not the public almanac. Here is what luck pillars mean in plain English.
A personal BaZi calendar tracks flowing year, month, and day pillars against your four pillars, not the same as everyone's yellow-calendar Yi/Ji. Here is what flow days mean for wearable color.
The public yellow calendar shows the same Yi/Ji for everyone; a personal BaZi calendar needs your birth pillars. Here is how they differ and when I use each layer.