D3.time.format Time Mode

var time = new Date (0, +);   2017.1.19 Thursday
var format = D3.time.format ('%a ');
Console.log (time);  Thu Jan 00:00:00 gmt+0800 (China Standard Time)
Console.log (' Week ', format);    Thu

%a: Abbreviation of the Week//Thu
%A: Full name of the Week//Thursday

%B: The abbreviation of the month//Jan
%B: Full name of the month//January

%d: Number of days in the month, less than 2 bits with 0 complement [01, 31]
%e: Number of days in the month, less than 2 spaces complete with blanks [1, 31]

%H: Hours, 24-hour system [00, 23]
%I: Hours, 12-hour system [01, 12]

%j: Number of days in the year [001, 366]
%M: Month [01, 12]
%M: minutes [00, 59]
%l: Ms [000, 999]
%p:am or PM
%s: seconds [00, 60]
%x: Date part, equivalent to "%m%d%y"
%x: Time part, equivalent to "%h:%m:%s"
%y: Year without epoch [00, 99]
%Y: a 4-digit year that contains a chronological number