集合時間（しゅうごうじかん、shuugoうjikan）
- meeting time

The Japanese word 集合時間 (しゅうごうじかん) means "meeting time" or "gathering time." It refers to the specific time at which people are scheduled to meet or gather at a designated location for a particular event or activity. This can be for anything from a casual get-together to a formal meeting. It is a crucial piece of information to ensure everyone arrives on time and the activity can begin as planned. The 集合時間 is essentially the agreed-upon start time for a collective action.

⚫︎ 映画の集合時間 Translation: The meeting time for the movie. ⚫︎ パーティーの集合時間は7時です。 Translation: The meeting time for the party is 7 o'clock. ⚫︎ 旅行の集合時間は朝8時です。 Translation: The meeting time for the trip is 8 AM.

You use 集合時間 whenever you want to specify the time when a group of people should meet. It is commonly used when planning events, trips, meetings, or any activity that involves multiple people. You can use it in various contexts, from informal conversations with friends to formal announcements or schedules. The word is generally followed by a specific time, like "7時" (7 o'clock) or "午前8時" (8 AM).

集合時間 is typically written in kanji and hiragana: 集合時間. ⚫︎ 集 (しゅう) means "to gather" or "to assemble." ⚫︎ 合 (ごう) means "to combine" or "to join." ⚫︎ 時間 (じかん) means "time." There are no other common ways to write this word. The okurigana (hiragana attached to kanji) is standardized.

There are some related words and phrases, though none are perfect synonyms: ⚫︎ 開始時間 (かいしじかん) - "Start time" (more formal) ⚫︎ 開始時刻 (かいしじこく) - "Starting time" (formal) ⚫︎ 待ち合わせの時間 (まちあわせのじかん) - "Meeting time" or "Appointment time" (slightly more general) ⚫︎ 時間 (じかん) - "Time" (can be used in context, but not a direct synonym).

There is no direct antonym, but you could consider the planned end time. You could also use the concept of being "late" or missing the meeting time. ⚫︎ 解散時間 (かいさんじかん) - "Dismissal time" or "End time" (for an event). ⚫︎ 遅刻 (ちこく) - "Being late"

明日のイベントの集合時間は午後2時です。 ・Translation: The meeting time for tomorrow's event is 2 PM. ・Explanation: This sentence clearly states when the event will begin, using 集合時間 to indicate the gathering time.

集合時間に遅れないように、早めに家を出ましょう。 ・Translation: Let's leave home early so we won't be late for the meeting time. ・Explanation: This sentence emphasizes the importance of punctuality and arriving at the 集合時間 on time.

The word 集合時間 is formed by combining the kanji and meaning of each character: 集 (to gather), 合 (to combine or join), and 時間 (time). The concept of meeting or gathering at a specific time has likely existed for as long as people have organized collective activities, with the combination of these words to form the term 集合時間 reflecting the importance of this concept in social and practical situations.