Jack：What are you making? Li Ming：It's a calendar！My grandfather forgets❷his birthday every year. Jack：Ha ha！A calendar is a good present for him. Li Ming：When is your birthday，Jack? Jack：My birthday？It's on August 11.Oh，no，that's my mum's birthday. My birthday is on August 23. Li Ming：OK，Jack. Maybe I need to make a calendar for you，too.