Many folktales revolve around the Milky Way, but perhaps none more tragically romantic than the Chinese. Once a year, magpies flock together across the Milky Way to form a bridge so that Zhī Nü (Weaver Girl) and Niú Láng (Cowherd Boy) can meet. For Zhī Nü is a goddess and Niú Láng is a mere mortal human, and Zhī Nü's mother, the Queen of Heaven, punished them by creating the Milky Way to separate them forever.

The reunion of those two tragic lovers spawned Qixi, the Chinese Valentine's Day. It falls annually on the seventh day of the seventh month on the Chinese lunar calendar. People celebrate by worshiping the celestials and floating lotus lanterns on the river for blessings.

It is also a tradition on this day to worship Yue Lao, or the old man under the moon, who is the god of love and marriage in Chinese folklore. Like Cupid, who shoots the arrows of love, Yue Lao binds lovers together with his red strings.

T.S. Eliot may have thought of April as "the cruelest month," but in Barcelona, and the rest of Catalonia in Spain, it is the most romantic. On April 23, Catalonians celebrate the Day of Books and Roses, where lovers give each other the gift of roses and books.

The day was also called Sant Jordi's Day, celebrated in the name of the patron saint of Catalonia, Saint George. Legend has it that he killed a dragon in the city of Silene, Libya, to save a princess and gave her a rose that blossomed from the dragon's spilled blood. Because of this, the most common depiction of Saint George was of him killing the dragon while riding a white horse.

Catalonians have been giving roses to each other as a token of love since the 15th century, but when Spain declared April 23 as Book Day to remember the writer Miguel de Cervantes, the day also became associated with literature. UNESCO's declaration of World Book and Copyright Day in 1995 further cemented the rose and the book together.

In 1977, the owner of Ishimura Manseido, a small sweets shop in Fukuoka, Japan, came up with the idea of "Marshmallow Day" after reading a letter in a women's magazine. The letter lamented that only men received chocolates on Valentine's Day since women traditionally gave men gifts on this day.

The owner took the reader's wish to receive marshmallows as a gift in response to the romantic token they gave on Valentine's Day and began selling them one month after Valentine's. The confectionery association based in Tokyo eventually took that idea and created White Day, which all sweetmakers could observe.

Since then, March 14, exactly one month after Valentine's Day, has become known as White Day. It is quite popular in numerous Asian countries, including Japan, Korea, and China. The concept of "return-gifting" (okaeshi), a deeply ingrained Japanese practice of giving a gift in return for a gift as an expression of gratitude, is particularly charming; after all, as the British American poet W.H. Auden wrote, "If equal affection cannot be / Let the more loving one be me."

Every year on Jan. 25, the Welsh celebrate their own Valentine's Day: St. Dwynwen's Day, or Dydd Santes Dwynwen in Welsh. It is the most romantic day of the year in Wales and has gained more traction recently.

St. Dwynwen was said to be a Welsh princess-turned-nun, her name meaning "she who leads a blessed life." Despite her fortunate name, Dwynwen had difficulty pursuing her true love.

The story says that her father has promised her in marriage, even though she already loved another man, Maelon Dyfodrull. Upset, Dwynwen ran away to the forest and asked for God's help, resulting in Maelon being turned to ice. Afterward, God granted her three wishes, and she used them to free Maelon and bless all the true lovers in the world.

The increasing popularity of St. Dwynwen's Day also adds to the local tourism industry. People flock to St. Dwynwen's Church at Llanddwyn Island on Anglesey. Others make or buy handcrafted lovespoons as a sign of their handiness and ability to provide for the family in the future. St. Dwynwen is also the patron saint of ill animals.

Chances are, Brazil's lavish Carnival festivities, which usually fall in February, would overshadow a quiet celebration of love and romance between couples. Rather than compete with the country's biggest holiday, a creative Brazilian publicist found another day to promote romantic relationships.

Like Japan's White Day, Brazil's Dia dos Namorados started in 1948 as a purely commercial endeavor. Publicist João Doria of São Paulo was tasked with helping increase the sales of a clothing store chain client. He created a campaign around June 12, the day before St. Anthony's Day, which celebrates lovers and married couples. June also saw a lull in sales after May, a month when purchases were usually healthy due to Mother's Day. Doria's new Dia dos Namorados (Lovers' Day) solved that problem.

More than seven decades later, Dia dos Namorados is still celebrated throughout the country. On the holiday, some Brazilians perform simpatías, rituals dedicated to St. Anthony, wishing to find their other halves or bless their current relationships. These practices can include offering a saucer of honey to the saint with a photo of yourself and someone you hope to develop a romantic relationship with.

Already committed couples typically celebrate the holiday with traditions similar to American Valentine's Day celebrations, exchanging gifts, flowers, and chocolates.

Story editing by Carren Jao. Copy editing by Paris Close. Photo selection by Clarese Moller.