add utcMonthDay, timeMonthDay

README.md

@@ -197,9 +197,8 @@ Hours (e.g., 01:00 AM); 60 minutes. Note that advancing time by one hour in loca
 
 <a name="timeDay" href="#timeDay">#</a> d3.<b>timeDay</b> · [Source](https://github.com/d3/d3-time/blob/main/src/day.js "Source")
 <br><a href="#timeDay">#</a> d3.<b>utcDay</b> · [Source](https://github.com/d3/d3-time/blob/main/src/day.js)
-<br><a href="#timeDay">#</a> d3.<b>unixDay</b> · [Source](https://github.com/d3/d3-time/blob/main/src/day.js)
 
-Days (e.g., February 7, 2012 at 12:00 AM); typically 24 hours. Days in local time may range from 23 to 25 hours due to daylight saving. d3.unixDay is like [d3.utcDay](#timeDay), except it counts days since the UNIX epoch (January 1, 1970) such that *interval*.every returns uniformly-spaced dates rather than varying based on day-of-month.
+Days (e.g., February 7, 2012 at 12:00 AM); typically 24 hours. Days in local time may range from 23 to 25 hours due to daylight saving.
 
 <a name="timeWeek" href="#timeWeek">#</a> d3.<b>timeWeek</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js "Source")
 <br><a href="#timeWeek">#</a> d3.<b>utcWeek</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js "Source")
@@ -277,9 +276,8 @@ Aliases for [d3.timeHour](#timeHour).[range](#interval_range) and [d3.utcHour](#
 
 <a name="timeDays" href="#timeDays">#</a> d3.<b>timeDays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/day.js)
 <br><a href="#timeDays">#</a> d3.<b>utcDays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/day.js)
-<br><a href="#timeDays">#</a> d3.<b>unixDays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/day.js)
 
-Aliases for [d3.timeDay](#timeDay).[range](#interval_range), [d3.utcDay](#timeDay).[range](#interval_range), and [d3.unixDay](#timeDay).[range](#interval_range).
+Aliases for [d3.timeDay](#timeDay).[range](#interval_range) and [d3.utcDay](#timeDay).[range](#interval_range).
 
 <a name="timeWeeks" href="#timeWeeks">#</a> d3.<b>timeWeeks</b>(<i>start</i>, <i>stop</i>[, <i>step</i>])
 <br><a href="#timeWeeks">#</a> d3.<b>utcWeeks</b>(<i>start</i>, <i>stop</i>[, <i>step</i>])

src/day.js

@@ -1,35 +1,37 @@
 import {timeInterval} from "./interval.js";
 import {durationDay, durationMinute} from "./duration.js";
 
-export const timeDay = timeInterval(
-  date => date.setHours(0, 0, 0, 0),
+export const timeMonthDay = timeInterval(
+  (date) => date.setHours(0, 0, 0, 0),
   (date, step) => date.setDate(date.getDate() + step),
   (start, end) => (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay,
-  date => date.getDate() - 1
+  (date) => date.getDate() - 1
+);
+
+export const timeMonthDays = timeMonthDay.range;
+
+export const utcMonthDay = timeInterval(
+  (date) => date.setUTCHours(0, 0, 0, 0),
+  (date, step) => date.setUTCDate(date.getUTCDate() + step),
+  (start, end) => (end - start) / durationDay,
+  (date) => date.getUTCDate() - 1
+ );
+
+export const utcMonthDays = utcMonthDay.range;
+
+export const timeDay = timeInterval(
+  (date) => date.setHours(0, 0, 0, 0),
+  (date, step) => date.setDate(date.getDate() + step),
+  (start, end) => (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay
 );
 
 export const timeDays = timeDay.range;
 
-export const utcDay = timeInterval((date) => {
-  date.setUTCHours(0, 0, 0, 0);
-}, (date, step) => {
-  date.setUTCDate(date.getUTCDate() + step);
-}, (start, end) => {
-  return (end - start) / durationDay;
-}, (date) => {
-  return date.getUTCDate() - 1;
-});
+export const utcDay = timeInterval(
+  (date) => date.setUTCHours(0, 0, 0, 0),
+  (date, step) => date.setUTCDate(date.getUTCDate() + step),
+  (start, end) => (end - start) / durationDay,
+  (date) => Math.floor(date / durationDay)
+);
 
 export const utcDays = utcDay.range;
-
-export const unixDay = timeInterval((date) => {
-  date.setUTCHours(0, 0, 0, 0);
-}, (date, step) => {
-  date.setUTCDate(date.getUTCDate() + step);
-}, (start, end) => {
-  return (end - start) / durationDay;
-}, (date) => {
-  return Math.floor(date / durationDay);
-});
-
-export const unixDays = unixDay.range;

src/index.js

@@ -33,10 +33,14 @@ export {
 export {
   timeDay,
   timeDays,
+  timeMonthDay,
+  timeMonthDays,
+  utcDay as unixDay, // deprecated; use utcDay
+  utcDays as unixDays, // deprecated; use utcDays
   utcDay,
   utcDays,
-  unixDay,
-  unixDays
+  utcMonthDay,
+  utcMonthDays
 } from "./day.js";
 
 export {

src/ticks.js

@@ -4,7 +4,7 @@ import {millisecond} from "./millisecond.js";
 import {second} from "./second.js";
 import {timeMinute, utcMinute} from "./minute.js";
 import {timeHour, utcHour} from "./hour.js";
-import {timeDay, unixDay} from "./day.js";
+import {timeDay, utcDay} from "./day.js";
 import {timeSunday, utcSunday} from "./week.js";
 import {timeMonth, utcMonth} from "./month.js";
 import {timeYear, utcYear} from "./year.js";
@@ -52,7 +52,7 @@ function ticker(year, month, week, day, hour, minute) {
   return [ticks, tickInterval];
 }
 
-const [utcTicks, utcTickInterval] = ticker(utcYear, utcMonth, utcSunday, unixDay, utcHour, utcMinute);
+const [utcTicks, utcTickInterval] = ticker(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute);
 const [timeTicks, timeTickInterval] = ticker(timeYear, timeMonth, timeSunday, timeDay, timeHour, timeMinute);
 
 export {utcTicks, utcTickInterval, timeTicks, timeTickInterval};