A person poses for a photograph underneath cherry blossom trees in Greenwich Park in London, Britain, April 17, 2022. REUTERS/Henry Nicholls 

A group sit together underneath cherry blossom trees during sunny weather in Greenwich Park in London, Britain, April 17, 2022. REUTERS/Henry Nicholls 

People pose for a photograph underneath cherry blossom trees during sunny weather in Greenwich Park in London, Britain, April 17, 2022. REUTERS/Henry Nicholls 

A person poses for a photograph underneath cherry blossom trees in Greenwich Park in London, Britain, April 17, 2022. REUTERS/Henry Nicholls 

People walk underneath cherry blossom trees during sunny weather in Greenwich Park in London, Britain, April 17, 2022. REUTERS/Henry Nicholls 

People walk underneath cherry blossom trees during sunny weather in Greenwich Park in London, Britain, April 17, 2022. REUTERS/Henry Nicholls 

A woman and child pose for a photograph underneath cherry blossom trees during sunny weather in Greenwich Park in London, Britain, April 17, 2022. REUTERS/Henry Nicholls 

Two tourists from Kazakhstan pose for a friend who takes a picture under cherry trees in full blossom in Heerstrasse (army street), world-wide known as the Cherry Blossom Avenue in Bonn, Germany, April 14, 2022. REUTERS/Wolfgang Rattay 

Two tourists from Kazakhstan pose for a friend who takes a picture under cherry trees in full blossom in Heerstrasse (army street), world-wide known as the Cherry Blossom Avenue in Bonn, Germany, April 14, 2022. REUTERS/Wolfgang Rattay 

A tourist from Kazakhstan poses for her friends for a picture under cherry trees in full blossom in Heerstrasse (army street), world-wide known as the Cherry Blossom Avenue in Bonn, Germany, April 14, 2022. REUTERS/Wolfgang Rattay 

A man walks near a blooming cherry blossom tree on a spring day in Berlin, Germany, April 14, 2022. REUTERS/Lisi Niesner 

A woman walks near a blooming cherry blossom tree on a spring day in Berlin, Germany, April 14, 2022. REUTERS/Lisi Niesner 

Blooming cherry blossoms are seen on a spring day in Berlin, Germany, April 14, 2022. REUTERS/Lisi Niesner 

A blooming cherry blossom tree is seen on a spring day in Berlin, Germany, April 14, 2022. REUTERS/Lisi Niesner 

A couple wearing masks to prevent contracting the coronavirus disease (COVID-19) takes a selfie underneath blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A woman wearing a mask to prevent contracting the coronavirus disease (COVID-19) takes photographs of blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A couple wearing masks to prevent contracting the coronavirus disease (COVID-19) takes a selfie underneath a blooming cherry blossom in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A man wearing a mask to prevent contracting the coronavirus disease (COVID-19) takes photographs of his girlfriend underneath a blooming cherry blossom in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

Policemen wearing masks to prevent contracting the coronavirus disease (COVID-19) pose for photographs underneath blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A boy reacts as he is lifted by his parents onto a blooming cherry blossom to take photographs in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY 

People wearing masks to prevent contracting the coronavirus disease (COVID-19) walk among blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A couple wearing masks to prevent contracting the coronavirus disease (COVID-19) walks among blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A couple wearing masks to prevent contracting the coronavirus disease (COVID-19) takes a selfie underneath a blooming cherry blossom in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

Women wearing masks to prevent contracting the coronavirus disease (COVID-19) take a selfie underneath blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A woman poses for photographs with a blooming cherry blossom in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

People wearing masks to prevent contracting the coronavirus disease (COVID-19) walk among blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A woman wearing a mask to prevent contracting the coronavirus disease (COVID-19) takes photographs of blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A couple wearing masks to prevent contracting the coronavirus disease (COVID-19) walks among blooming cherry blossoms in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A couple wearing masks to prevent contracting the coronavirus disease (COVID-19) takes photographs of a blooming cherry blossom in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

A man wearing a mask to prevent contracting the coronavirus disease (COVID-19) takes photographs of his girlfriend underneath a blooming cherry blossom in Seoul, South Korea, April 9, 2022. REUTERS/Kim Hong-Ji 

Women wearing protective masks walk near cherry blossom trees at the Jardin des Plantes botanical garden in Paris, France, April 6, 2022. REUTERS/Sarah Meyssonnier 

Women wearing protective masks photograph a cherry blossom tree at the Jardin des Plantes botanical garden in Paris, France, April 6, 2022. REUTERS/Sarah Meyssonnier 

A man photographs cherry blossom trees at the Jardin des Plantes botanical garden in Paris, France, April 6, 2022. REUTERS/Sarah Meyssonnier 

A woman looks at a cherry blossom tree as she walks next to it at the Jardin des Plantes botanical garden in Paris, France, April 6, 2022. REUTERS/Sarah Meyssonnier 

People take a walk among cherry blossoms at a park in Seoul, South Korea, April 6, 2022. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY 

A couple takes a photograph with cherry blossoms in a park in Seoul, South Korea, April 6, 2022. REUTERS/Kim Hong-Ji 

People enjoy a spring day with cherry blossoms in a park in Seoul, South Korea, April 6, 2022. REUTERS/Kim Hong-Ji 

A woman takes a photograph of cherry blossoms in a park in Seoul, South Korea, April 6, 2022. REUTERS/Kim Hong-Ji 

Visitors stroll under illuminated cherry blossoms in full bloom, amid the coronavirus disease (COVID-19) pandemic, at Ueno Park in Tokyo, Japan March 30, 2022. REUTERS/Issei Kato 

Visitors take selfie photos under illuminated cherry blossoms in full bloom, amid the coronavirus disease (COVID-19) pandemic, at Ueno Park in Tokyo, Japan March 30, 2022. REUTERS/Issei Kato 

Visitors take photos under illuminated cherry blossoms in full bloom, amid the coronavirus disease (COVID-19) pandemic, at Ueno Park in Tokyo, Japan March 30, 2022. REUTERS/Issei Kato 

Visitors take photos under illuminated cherry blossoms in full bloom, amid the coronavirus disease (COVID-19) pandemic, at Ueno Park in Tokyo, Japan March 30, 2022. REUTERS/Issei Kato 

A visitor takes a photo under illuminated cherry blossoms in full bloom, amid the coronavirus disease (COVID-19) pandemic, at Ueno Park in Tokyo, Japan March 30, 2022. REUTERS/Issei Kato 

Visitors stroll under illuminated cherry blossoms in full bloom, amid the coronavirus disease (COVID-19) pandemic, at Ueno Park in Tokyo, Japan March 30, 2022. REUTERS/Issei Kato 

Visitors take photos under illuminated cherry blossoms in full bloom, amid the coronavirus disease (COVID-19) pandemic, at Ueno Park in Tokyo, Japan March 30, 2022. REUTERS/Issei Kato 

People walk under cherry blossom trees at the Oriental Park of Maulevrier, France, March 29, 2022. REUTERS/Stephane Mahe 

The Washington Monument is seen in the background as people walk amongst the cherry blossoms along the Tidal Basin in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

The Washington Monument is seen through cherry blossoms from East Potomac Park in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

The Washington Monument is seen through cherry blossoms along the Tidal Basin in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

The Washington Monument is seen in the background as people walk amongst the cherry blossoms along the Tidal Basin in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

A woman poses for a photo amongst the cherry blossoms along the Tidal Basin in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

The Washington Monument is seen in the background as people walk amongst the cherry blossoms along the Tidal Basin in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

The Washington Monument is seen through cherry blossoms from East Potomac Park in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

The Washington Monument is seen in the background as people walk amongst the cherry blossoms along the Tidal Basin in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

The U.S. Capitol dome is seen through cherry blossoms along the Tidal Basin in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

Cherry blossoms are seen along the Tidal Basin in Washington, U.S., March 28, 2022. REUTERS/Elizabeth Frantz 

A woman uses her phone under blooming plum blossoms, following the coronavirus disease (COVID-19) outbreak, near Ming Dynasty City Wall Relics Park in Beijing, China, March 28, 2022. REUTERS/Tingshu Wang 

A man wearing a protective glasses and a face mask looks on under blooming plum blossoms, following the coronavirus disease (COVID-19) outbreak, in Beijing, China, March 28, 2022. REUTERS/Tingshu Wang 

Women use their phones under blooming plum blossoms, following the coronavirus disease (COVID-19) outbreak, in Beijing, China, March 28, 2022. REUTERS/Tingshu Wang