Introduction - If you have any usage issues, please Google them yourself
In the debugging process because of the limited level, there may be hidden problems and unable in this experiment shown, required to complete a long time of handover, but because I failed to make a limited capacity, to produce a single time zone, countdown , because the calculation is in strict accordance with the different number of days each month and leap years and non-leap year difference when calculating the remaining time is not stringent enough