From 7b14449df4db0e1ffd2e12b94f35bae7414c0332 Mon Sep 17 00:00:00 2001
From: Henrik Giesel <hengiesel@gmail.com>
Date: Thu, 7 Jan 2021 17:14:31 +0100
Subject: [PATCH] Fix one-off error for Histograms:

examples:
* x0 = -66 and x1 = -64 should yield 65-66 days ago instead of 64-65 days ago
* x0 = -2 and x1 = 0 should yield 1-2 days ago instead of 0-1 days ago
---
 ts/graphs/future-due.ts | 1 -
 ts/lib/time.ts          | 4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/ts/graphs/future-due.ts b/ts/graphs/future-due.ts
index 339864f46..6515a11c6 100644
--- a/ts/graphs/future-due.ts
+++ b/ts/graphs/future-due.ts
@@ -42,7 +42,6 @@ export function gatherData(data: pb.BackendProto.GraphsOut): GraphData {
             if (isLearning(c)) {
                 const offset = c.due - data.nextDayAtSecs
                 dueDay = Math.floor(offset / 86_400) + 1;
-
             } else {
                 // - testing just odue fails on day 1
                 // - testing just odid fails on lapsed cards that
diff --git a/ts/lib/time.ts b/ts/lib/time.ts
index 7ad6c61d7..c3eebefb8 100644
--- a/ts/lib/time.ts
+++ b/ts/lib/time.ts
@@ -151,8 +151,8 @@ export function dayLabel(i18n: I18n, daysStart: number, daysEnd: number): string
             });
         } else {
             return i18n.tr(i18n.TR.STATISTICS_DAYS_AGO_RANGE, {
-                daysStart: Math.abs(daysEnd),
-                daysEnd: -daysStart - 1,
+                daysStart: Math.abs(daysEnd - 1),
+                daysEnd: -daysStart,
             });
         }
     }