# Functions
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----------------------- HOUR ---------------------------- check cross 24 hours for diff cross day.
----------------------- DAY ---------------------------- check cross day for zero(0/24) clock.
check cross "now" day for zero(0/24) clock.
check cross hours.
----------------------- Min ---------------------------- check cross mins.
check cross month for compare time.
----------------------- MONTH ---------------------------- check cross month for now time.
----------------------- Second ---------------------------- check cross seconds.
check cross year for compare time.
----------------------- YEAR ---------------------------- check cross year for now time.
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# Constants
一天多少小时.
一天多少分钟.
一天多少秒.
一个小时多少分钟.
一个小时多少秒.
一分钟多少秒.
一周7天.
一周多少小时.
一周多少分钟.
一周多少秒.