to come across

• 相逢

  meet

• 逢人便说

  tell everyone one meets

• 每逢假日

  on every holiday

• 每逢月初

  at the beginning of every month

• 每逢这样的场合

  on such occasions

• 千载难逢

  once in a blue moon

• 每逢佳节倍思亲

  it is during festivals that one misses loved ones more than ever