cherry-blossom viewing ＝お花見、で使えますがコメントにあるように、[お酒を飲んだり](https://eikaiwa.dmm.com/uknow/questions/85947/)することを伝えたいときは、partyをつけると伝わりやすいです。
もし、そこでバーベキューするときは、
cherry-blossom viewing with BBQ
ただ、春に[桜](https://eikaiwa.dmm.com/uknow/questions/31177/)をめでる日本の文化を伝えたいときは、OHANAMIと表現することも可能だと思います。
OHANAMI is one of Japanese spring customs. We enjoy the transient beauty of cherry-blossom, sometimes with some drink.
こんなふうに文章にして伝えてみてはいかがでしょう？
＜ボキャブラリー＞
cherry blossom = 桜
view = 見る
BBQ = バーベキュー
spring = 春
We gather near the cherry blossom to socialise - it's traditional in Japan
We picnic, drink and chat under the cherry blossom
"Hey, what are you doing tomorrow?"
"I plan on participating in hanami."
"What's that exactly?"
"We gather near the cherry blossom to socialise - it's traditional in Japan."
"Great! Do you mind if I come along?"
"No, be my guest!"
"Hey, what are you doing tomorrow?" やー明日どこ行くんだい？
"I plan on participating in hanami." 花見にいこうと思ってるよ
"What's that exactly?" なにそれー！
"We gather near the cherry blossom to socialise - it's traditional in Japan." 桜の木のしたでみんなでお酒を楽しんだりお付き合いすることだよ
"Great! Do you mind if I come along?"いいねー、一緒にいっていいかい？
"No, be my guest!" いいよ！連れてくよ
During the spring we get together and have food and drinks while enjoying the freshly bloomed cherry blossoms.
Cherry blossom viewing party. - This is a simple sentence you can use to express hanami.
During the spring we get together and have food and drinks while enjoying the freshly bloomed cherry blossoms.
- This is a more detailed explanation of the event. Giving the listener a little bit more detail such as the time of year and what you do.
Cherry blossom viewing party.
花見を表現するための表現です。
During the spring we get together and have food and drinks while enjoying the freshly bloomed cherry blossoms.
時期や内容、どんなことをするのかなど、どういうイベントなのかをを説明するときの表現です。
Hanami doesn't translate directly into English, but the best way is to explain that it is a "Cherry Blossom viewing party". This will let people know what it is "Cherry Blossom viewing" and who is coming 'party". It would be helpful to go a step further and tell them that there is drinking and food eating as well. If you are going to somewhere like Meguro River we would call that a "Cherry Blossom viewing Festival" as it is a large gathering anyone can enjoy.
Hanami (the cherry blossom festival) is an annual Japanese tradition.
People join under the cherry blossoms to celebrate the spring season and the beauty of nature.
The people sing, eat and drink tea or alcohol underneath the trees in celebration.
Example
A: What are they celebrating?
B: Hanami
A: What is that?
B: The cherry blossom festival
花見(= the cherry blossom festival) は日本の伝統年間行事です。
人々は桜の木の下で春の訪れと自然の美しさを祝います。
歌ったり、食べたり、お茶やお酒を飲んだりして木の下でお祝いします.
（例文）
A: What are they celebrating?何を祝っているの？
B: Hanami花見だよ
A: What is that?なにそれ？
B: The cherry blossom festival 春の季節のお祭りだね
Hanami Is when people get together to eat, drink and talk
Hanami Is a gathering where you eat,drink,socialize while enjoying cherry blossoms
"Hanami Is a gathering where you eat,drink,socialize while enjoying cherry blossoms"
A 'Gathering' is the term used to describe an event where people will get together, to 'gather' in one place.
'socialize' is often referenced when there is a gathering/get together of people were you can talk, drink, eat and have a good time.
"Hanami Is a gathering where you eat,drink,socialize while enjoying cherry blossoms"
（花見とは、桜を見ながら食べたり飲んだり人と交流するための集まりをいいます）
'Gathering' は、人が集まるイベントをいいます。
'Socialize' は、人が集まって話をしたり飲んだり食べたり楽しい時間を過ごすときによく使われる言葉です。
When people have a picnic, they eat a meal out of doors, usually in a field or a forest, or at the beach.
'A picnic under the cherry-blossoms'
Let's have a picnic under the cherry-blossom trees.
We're going on a picnic tomorrow.
We'll take a picnic lunch.
ピクニックに行く時、運動場や森やビーチなど、屋外で食べ物を食べます。
'A picnic under the cherry-blossoms.'
例 Let's have a picnic under the cherry-blossom trees.
（お花見に行こうよ。)
We're going on a picnic tomorrow.
（私たちは明日お花見に行きます。）
We'll take a picnic lunch.
（私たちはピクニックにお弁当を持っていきます。）
こんにちは。
「花見」は日本の文化ですので、英語で表現するときは説明を加える必要があるかもしれません。
シンプルに cherry blossom viewing party と言えばだいたいのニュアンスは伝わるかと思います。
例：
We have a culture of "hanami" in Japan, where people get together to eat and drink while enjoying the beautiful cherry blossoms.
日本には「花見」という文化があります。人々が集まり、美しい桜を楽しみながら食べたり飲んだりします。
ぜひ参考にしてください。
日本 
アメリカ合衆国 
イギリス 
南アフリカ 
ニュージーランド 
