Being convenient or favorable for someone's schedule or situation; something that fits well with one's plans.
明日の午後は都合がいいですか。
Is tomorrow afternoon convenient for you?
君の提案は都合がいいけれど、予算が足りない。
Your proposal is convenient (for timing), but we don't have enough budget.
その時間帯は私の都合がいいので参加します。
That time slot works well for me, so I'll participate.
都合がいい理由を聞かせてください。
Please tell me why it's convenient (for you).