Revert "add 'timezone_date'"

This reverts commit 7a54c258a019ee601dd6a8d576f004471129ffa7.
Revert "update 'README.md'"

This reverts commit 84ba06da01e42d176137bed0a94d01027f350c7e.
Revert "update 'README.md'"

This reverts commit 5d5ebca8cc361b5c934209db69d3144fbed4d67e.