fast-import: prevent producing bad delta

diff --git a/date.c b/date.c
index 00f9eb5d0b9730107a8e08e92eb04d4cc9233595..896fbb48060c673b8dc2f2aa6ea3de3c1042fbd2 100644 (file)
--- a/date.c
+++ b/date.c
@@ -129,8 +129,9 @@ const char *show_date_relative(unsigned long time, int tz,
        }
        /* Give years and months for 5 years or so */
        if (diff < 1825) {
-               unsigned long years = diff / 365;
-               unsigned long months = (diff % 365 + 15) / 30;
+               unsigned long totalmonths = (diff * 12 * 2 + 365) / (365 * 2);
+               unsigned long years = totalmonths / 12;
+               unsigned long months = totalmonths % 12;
                int n;
                n = snprintf(timebuf, timebuf_size, "%lu year%s",
                                years, (years > 1 ? "s" : ""));