If you would like to set off private fireworks outside of New Year's Eve, you need a special permit.
You can only obtain this permit to set off fireworks of category F2 ("New Year's Eve fireworks").
Notice: Only at the turn of the year (on 31 December and 1 January) may you, as a private person over the age of 18, burn off fireworks of category F2 ("New Year's Eve fireworks") without a permit. The permitted burning times may be further restricted by the municipal or city administration.
You have no legal claim to the granting of an exceptional permit.
Notice: Even with such an exceptional permit, you are not allowed to burn fireworks of the Category F3, F4, stage fireworks of category T2 or other pyrotechnic articles of category P2.
The same applies to the fireworks of category F2 listed in § 20 paragraph 4 of the First Ordinance on Explosives Law, such as rockets with more than 20 g net explosive mass.