format:"%Y-%m-%d %H:%M:%S"
"%Y年%m月%d号 %H:%M:%S"
d3/d3-time-format: Parse and format times, inspired by strptime and strftime. (github.com)
%a - abbreviated weekday name.*%A - full weekday name.*%b - abbreviated month name.*%B - full month name.*%c - the locale’s date and time, such as %x, %X.*%d - zero-padded day of the month as a decimal number [01,31].%e - space-padded day of the month as a decimal number [ 1,31]; equivalent to %_d.%f - microseconds as a decimal number [000000, 999999].%g - ISO 8601 week-based year without century as a decimal number [00,99].%G - ISO 8601 week-based year with century as a decimal number.%H - hour (24-hour clock) as a decimal number [00,23].%I - hour (12-hour clock) as a decimal number [01,12].%j - day of the year as a decimal number [001,366].%m - month as a decimal number [01,12].%M - minute as a decimal number [00,59].%L - milliseconds as a decimal number [000, 999].%p - either AM or PM.*%q - quarter of the year as a decimal number [1,4].%Q - milliseconds since UNIX epoch.%s - seconds since UNIX epoch.%S - second as a decimal number [00,61].%u - Monday-based (ISO 8601) weekday as a decimal number [1,7].%U - Sunday-based week of the year as a decimal number [00,53].%V - ISO 8601 week of the year as a decimal number [01, 53].%w - Sunday-based weekday as a decimal number [0,6].%W - Monday-based week of the year as a decimal number [00,53].%x - the locale’s date, such as %-m/%-d/%Y.*%X - the locale’s time, such as %-I:%M:%S %p.*%y - year without century as a decimal number [00,99].%Y - year with century as a decimal number, such as 1999.%Z - time zone offset, such as -0700, -07:00, -07, or Z.%% - a literal percent sign (%).SSS表示毫秒级