[Ans] On which day is Walpurgis Night celebrated across Scandinavia and northern Europe?

Step 1 : Introduction to the question "On which day is Walpurgis Night celebrated across Scandinavia and northern Europe?"

...elebrations, more for adults as there is usually a generous flow of alcohol, begin on the evening of April 30 and carry-over into the next day. The day after is for familiy; a time when friends and relatives picnic in parks to celebrate spring's arrival. Source: Britannica.co

[Ans] in 1884, who led 21 elephants across the brooklyn bridge to prove it was safe?

Step 1 : Introduction to the question "in 1884, who led 21 elephants across the brooklyn bridge to prove it was safe?"

The bridge—originally referred to as the New York and Brooklyn Bridge and as the East River Bridge— was opened for use on May 24, 1883. Thousands of people attended the opening ceremony and many ships were present in the East Bay for the occasion.