一天一个样

一天一個樣
yītiānyīgeyàng
to change from day to day

CEDICT

Entry Composition

1 一天 yītiān
  1. (colloquial) the whole day
  2. one day (twenty-four hours)
  3. someday; one day
  4. the entire daytime of one day
  5. the whole day
2 一个样 yīgeyàng the same; of the same type