時だ

it's time

→ 時
phrase Common #3,702
it's time Literally “is time.” Used to say that it is the appropriate time for something; 時 can also mean “when” in phrases such as 子供の時だ, “when I was a child.” The だ ending is plain and more casual than です.
JA: もう家に帰る時だ。
EN: It's time to go home.

今こそ行動する時だ

Now is the time to act.

我々にとって一番大切な時だ

Now is the most important time for us.

彼が母親愛人を殺した時だ

It was when he killed his mother and his mistress.

— サイコ (1960)

子供の遊びだけど本物を使う時だ

It’s child’s play, but it’s time to use the real thing.

— ダイ・ハード (1988)

から飛び出して英国人心臓貫いた時だ

It was when it shot out of the gun and pierced an Englishman’s heart.

— RRR (2022)

散髪すべき時だ

It's time to get a haircut.

を吐く時だ

It's time to breathe fire.

— バーフバリ 伝説誕生 (2015)

計画を実行すべき時だ

It's time to put the plan into action.

君の計算科学実践移す時だ

It’s your calculation. It’s time to put science into practice.

— オッペンハイマー (2023)

夜が明ける時が帰る時だ

When dawn breaks, it's time to go home.

— 恋する惑星 (1994)

行動する時だ

Now is the time to take action.

この辺で少し生意気になってきてるこいつらレッスン教えてやる時だ

It's time to teach these guys, who've been getting a little cocky around here, a lesson.

— 罪人たち (2025)

死ぬ時だ

Now is the time to die.

— ザ・マン・フロム・アース (2007)

ぶらぶら遊んで若い日々を無駄に過ごすのをやめるべき時だ

It’s time to stop fooling around and wasting your youth.

今こそ決心すべき時だ

Now is the time to make up your mind.

苦い真実を知る時だ

It's time to face the bitter truth.

— 善き人のためのソナタ (2006)