Dear Sir/Madam:
Cordially invite you to a dinner party held in Yitian Garden at 6:30 pm this Saturday.
Look forward to having you as our guest!
Best regards,
XXX
英语日期
附：译文
诚挚邀请您参加本周六下午6:30在伊天园举行的晚宴.
期待您的光临.
XXX 敬上
日期