Meaning of zhōu rì:
zhōu rì
周日
Noun
Sunday
Wǒmen jìhuà zài zhège zhōurì qù gōngyuán yěcān.
我们计划在这个周日去公园野餐。
We plan to go for a picnic in the park this Sunday.
Adjective
diurnal
Wǒmen jìhuà zài zhōurì qù hǎitān.
我们计划在周日去海滩。
We plan to go to the beach on Sunday.