What do you mean by auspicious days in the Gregorian calendar?

The yellow calendar, called the imperial calendar, is based on the lunar calendar in China, and there are many calendars indicating the good luck or bad luck of a day.

The Gregorian calendar is divided into sacrifice, burial, marriage, travel, blessing, ground breaking, bed setting, opening, mining, burial, migration, ground breaking, dissolution, residence, construction, planting, market opening, relocation, alliance signing, demolition, filing, trading and finding successors.

Demolition on an auspicious day means demolition on an auspicious day.