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.