Can I go to Jiuhua Mountain to burn incense on the taboo day of the calendar?

Yes, there is no such provision in Buddhism. As long as it's really religious and respectful. Remember that sincerity is the greatest blessing.

You can also install a lucky star wish on your mobile phone, which invites many gods and buddhas, such as Guanyin Bodhisattva. It is very sacred and solemn. You can carry it with you at ordinary times, which can not only protect your body and heart, but also pray devoutly!

May the troubles of the three obstacles be eliminated, and may wisdom be truly clear. May the bodhisattva bless you!