Tu B'Av in Israel
Tu B'Av in Israel is held on August 8. Lit. 'fifteenth of Av', hebrew- ט"וּ באב - is a minor Jewish holiday. In modern-day Israel, it is celebrated as a holiday of love. This event in the first decade of the month August is annual. 
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According to the Mishna, Tu B'Av was a joyous holiday in the days of the Temple in Jerusalem, marking the beginning of the grape harvest. Yom Kippur marked the end of the grape harvest. On both dates the unmarried girls of Jerusalem dressed in white garments, and went out to dance in the vineyards.
Like Valentine's Day, Tu B'Av is celebrated in Israel with flowers, cards, romantic dinners, parties and festivals of singing and dancing. Women and men are keeping the tradition of wearing white at many of these celebrations. The holiday is also considered to be a good date for a wedding.
Similar holidays and events, festivals and interesting facts
The Hanse Sail in Rostock on August 7 (Typically begins on Thursday of the first full week of August);
Cranger Kirmes on August 7
Arolsen Market and Cattle Market on August 7
Stall and Cattle Market in Bad Arolsen on August 7
Peace Festival in Augsburg, Germany on August 8
Gäubodenfest Straubing on August 8
Wiesbaden Rheingau Wine Week on August 8
Bretzenheimer Kerb on August 8
Cider Festival in Frankfurt on August 8 (starts on Friday of the second week of August);
Bernemer Kerb on August 8
SonneMondSterne Festival on August 8
Viking Days in Schleswig on August 8
Street Food Festival in Singen on August 8
Micro! festival in Dortmund on August 8
Bocholt Aasee Festival on August 8
Summer Evening in Aachen on August 8
Rinteln Old Town Festival on August 8
Old Town Festival on the Heumarkt in Cologne on August 8
Festival of Lights in Bad Wildungen on August 9
Raksha Bandhan on August 9
M'era Luna Festival on August 9
Pyro Games Magdeburg on August 9 (duel of the fireworks);
Drachenstich in Furth im Wald on August 9 (The Drachenstich is part of the Furth im Wald folk festival)