diff --git a/skyfield/timelib.py b/skyfield/timelib.py
index <HASH>..<HASH> 100644
--- a/skyfield/timelib.py
+++ b/skyfield/timelib.py
@@ -223,7 +223,6 @@ class JulianDate(object):
         bc = year < 1
         year = abs(year - bc)
         era = where(bc, 'B.C.', 'A.D.')
-        # TODO: does the JPL really zero-fill years < 4 digits?
         format = '%s %04d-%s-%02d %02d:%02d:%02d.%04d UT'
         args = (era, year, _months[month], day, hour, minute, second, fraction)
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The answer was "yes".