D3 时间格式

%a - abbreviated weekday name. %A - full weekday name. %b - abbreviated month name. %B - full month name. %c - date and time, as “%a %b %e %H:%M:%S %Y”. %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. %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. %S - second as a decimal number [00,61]. %U - week number of the year (Sunday as the first day of the week) as a decimal number [00,53]. %w - weekday as a decimal number [0(Sunday),6]. %W - week number of the year (Monday as the first day of the week) as a decimal number [00,53]. %x - date, as “%m/%d/%Y”. %X - time, as “%H:%M:%S”. %y - year without century as a decimal number [00,99]. %Y - year with century as a decimal number. %Z - time zone offset, such as “-0700”. %% - a literal “%” character.