What are the idioms that describe obsolescence?

1, alternate calendar: Interpretation: The imperial calendar originally refers to the almanac promulgated by the Qing court, also known as the imperial calendar, and later refers to the almanac. A year later, the yellow calendar;

2, the old tune does not play: Chen tune no longer plays. Metaphor is that outdated things are no longer popular;

3, tomorrow's yellow flower: interpretation: outdated and meaningless. Originally refers to chrysanthemums that gradually wither after the Double Ninth Festival;

4. Follow the old rules: Interpretation: Outdated rules and regulations refer to the old rules. Tradition: the meaning of continuing to use;

5. Vientiane Update: Interpretation: Things or scenes have changed their faces;

6. Time has changed: interpretation: environment: environment, situation: dynamic: dynamic, changing. As time went on, the situation changed.