diff --git a/src/python/pyfes/data/leap-seconds.txt b/src/python/pyfes/data/leap-seconds.txt
index e52effc..6f861c8 100644
--- a/src/python/pyfes/data/leap-seconds.txt
+++ b/src/python/pyfes/data/leap-seconds.txt
@@ -1,5 +1,5 @@
-#	ATOMIC TIME.
-#	The Coordinated Universal Time (UTC) is the reference time scale derived
+#	ATOMIC TIME
+#	Coordinated Universal Time (UTC) is the reference time scale derived
 #	from The "Temps Atomique International" (TAI) calculated by the Bureau
 #	International des Poids et Mesures (BIPM) using a worldwide network of atomic
 #	clocks. UTC differs from TAI by an integer number of seconds; it is the basis
@@ -8,34 +8,34 @@
 #
 #	ASTRONOMICAL TIME (UT1) is the time scale based on the rate of rotation of the earth.
 #	It is now mainly derived from Very Long Baseline Interferometry (VLBI). The various
-#	irregular fluctuations progressively detected in the rotation rate of the Earth lead
+#	irregular fluctuations progressively detected in the rotation rate of the Earth led
 #	in 1972 to the replacement of UT1 by UTC as the reference time scale.
 #
 #
 #	LEAP SECOND
-#	Atomic clocks are more stable than the rate of the earth rotation since the latter
+#	Atomic clocks are more stable than the rate of the earth's rotation since the latter
 #	undergoes a full range of geophysical perturbations at various time scales: lunisolar
-#	and core-mantle torques, atmospheric and oceanic effetcs, etc.
+#	and core-mantle torques, atmospheric and oceanic effects, etc.
 #	Leap seconds are needed to keep the two time scales in agreement, i.e. UT1-UTC smaller
-#	than 0.9 second. Therefore, when necessary a "leap second" is applied to UTC.
+#	than 0.9 seconds. Therefore, when necessary a "leap second" is applied to UTC.
 #	Since the adoption of this system in 1972 it has been necessary to add a number of seconds to UTC,
 #	firstly due to the initial choice of the value of the second (1/86400 mean solar day of
 #	the year 1820) and secondly to the general slowing down of the Earth's rotation. It is
-#	theorically possible to have a negative leap second (a second removed from UTC), but so far,
+#	theoretically possible to have a negative leap second (a second removed from UTC), but so far,
 #	all leap seconds have been positive (a second has been added to UTC). Based on what we know about
 #	the earth's rotation, it is unlikely that we will ever have a negative leap second.
 #
 #
 #	HISTORY
-#	The first leap second was added on June 30, 1972. Until yhe year 2000, it was necessary in average to add a
+#	The first leap second was added on June 30, 1972. Until the year 2000, it was necessary in average to add a
 #       leap second at a rate of 1 to 2 years. Since the year 2000 leap seconds are introduced with an
-#	average interval of 3 to 4 years due to the acceleration of the Earth rotation speed.
+#	average interval of 3 to 4 years due to the acceleration of the Earth's rotation speed.
 #
 #
-#	RESPONSABILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC
+#	RESPONSIBILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC
 #	The decision to introduce a leap second in UTC is the responsibility of the Earth Orientation Center of
 #	the International Earth Rotation and reference System Service (IERS). This center is located at Paris
-#	Observatory. According to international agreements, leap seconds should only be scheduled for certain dates:
+#	Observatory. According to international agreements, leap seconds should be scheduled only for certain dates:
 #	first preference is given to the end of December and June, and second preference at the end of March
 #	and September. Since the introduction of leap seconds in 1972, only dates in June and December were used.
 #
@@ -60,15 +60,15 @@
 #
 #	The following line shows the last update of this file in NTP timestamp:
 #
-#$	3913697179
+#$	3945196800
 #
 #	2) Expiration date of the file given on a semi-annual basis: last June or last December
 #
-#	File expires on 28 December 2024
+#	File expires on 28 December 2025
 #
 #	Expire date in NTP timestamp:
 #
-#@	3944332800
+#@	3975868800
 #
 #
 #	LIST OF LEAP SECONDS
@@ -117,4 +117,4 @@
 #	please see the readme file in the 'source' directory :
 #	https://hpiers.obspm.fr/iers/bul/bulc/ntp/sources/README
 #
-#h	9dac5845 8acd32c0 2947d462 daf4a943 f58d9391
+#h	848434d5 570f7ea8 d79ba227 a00fc821 f608e2d4