7:30 по-английски

Вот основные варианты:

• seven thirty (читается как “семн три́ти”) — нейтрально, просто время
• seven thirty a.m. / seven thirty a.m. — утро
• seven thirty p.m. — вечер
• half past seven — британский стиль, значит 7:30
  • It’s half past seven. (Сейчас 7:30)

Примеры:

• It's seven thirty. (Сейчас 7:30.)
• The meeting is at seven thirty in the morning. / The meeting is at 7:30 a.m.
• The movie starts at seven thirty p.m. / The movie starts at 7:30 p.m.
• In the timetable you might see 07:30, read as seven thirty or zero seven thirty.