Tu B'Av in Israel
Tu B'Av in Israel is held on August 18. 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 second 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 Bremen Music Festival on August 17 (Begins on the third Saturday in August);
Raksha Bandhan on August 19
Bamberg Sandkerwa on August 22
Osterstraße Wine Festival, Hamburg on August 22 (starts on the fourth Thursday in August);
International Day of Remembrance for Victims of Violence Due to Religion or Belief on August 22 (International Day Commemorating the Victims of Acts of Violence Based on Religion or Belief - established since May 28, 2019 - UN A/RES/73/296);
Regensburg Dult on August 23 (Held twice a year, in May and in August - early September);
Frankfurt Museumsuferfest on August 23 (takes place from the fourth Friday in August);
Hessian Blues-, Schmus- & Applesauce Festival in Laubach on August 23
Lantern Festival in Germany on August 23