What does the Buddhist saying of 33 days mean?

In Buddhism, the Thirty-three Heavens (also known as the Sumeru Peak Heaven, Shanjian Heaven, Sumeru Elder Heaven, etc.) was one of the main heavenly realms and was considered to be the highest level of the Heavenly Dao. The specific meaning of 33 Heavens was as follows: 1. Mount Meru's top sky: The top of Mount Meru is the highest level of the Heaven Realm. The "Mount Meru" here was a mountain peak used in Buddhism as a metaphor for the composition of the universe, so the 33 heavens were also called the "mountaintop sky". 2 Good to see the sky: Good to see the sky is the second highest of the 33 heavens. It is a day to enjoy the phenomenon of polar daylight. On this day, the sun and moon would shine on the earth, making everything appear very bright and beautiful. 3. Elder Heaven Meru: Elder Heaven Meru is the third day of the 33 heavens. It is also the time when the sun rises in the morning and sets at night. In this heavenly realm, people often observed the appearance of auroras, which was also a manifestation of the "aurora" in Buddhism. 4. Other heavenly realms: In addition to the Elder Meru Heavenly Realm, there are other heavenly realms such as the Corpse Heavenly Realm, the Meru Heavenly Realm, the Yudan Heavenly Realm, and so on. Each heavenly realm has its own unique characteristics and scenes. The Thirty-three Heavens was an extremely important and special heavenly realm in Buddhism. It represented the position and status of mankind in the universe. In Buddhism, the people of the Thirty-three Heavens were considered sentient beings who had transcended the cycle of life and death and were in a state of release.