The NTP server always returns year 2038 for testing purpose.
常に2038年を返すテスト用NTPサーバ（ぉ
You can pull ichikawayukko/ntp2038 image from Doker Hub to use!
どっかーはぶに置いてある ichikawayukko/ntp2038 イメージをご利用ください！
You can set OFFSET_YEAR, OFFSET_DAYS variable to return another year.
OFFSET_YEAR, OFFSET_DAYS 環境変数を設定することで、ほかの年を返すことも可能。
Set offset years
Default: Diference from year 2038. (13 on Year 2025)
何年分ずらした日時を返すのかを指定します
デフォルト: 2038年との差分（2025年の場合は13）
Set offset days. (Leap years)
Default: 3 (Leap year 2028, 2032, 2036)
何日分ずらした日時を返すのかを指定します（閏年用）
デフォルト： 3 （閏年3日分。2028, 2032, 2036年用）
Set upstream NTP server to sync.
Default: pool.ntp.org
同期する上流のNTPサーバを指定します
デフォルト: pool.ntp.org
Set additional configuration line if you want.
Default: ""
追加設定値がある場合はここに書きます
デフォルト: ""
You can connect to ntp2038.yuriko.co.nz(IPv4/IPv6), ntp2038.akiba.yuriko.co.nz(IPv6 only) for test this NTP server!
Or run ntpdate -qdv ntp2038.akiba.yuriko.co.nz command like below!
[root@trijn ~]# ntpdate -qdv ntp2038.akiba.yuriko.co.nz
26 Mar 03:44:55 ntpdate[24378]: ntpdate 4.2.6p5@1.2349-o Tue Jun 23 15:38:19 UTC 2020 (1)
Looking for host ntp2038.akiba.yuriko.co.nz and service ntp
host found : cisco-ucs.home.yuriko.co.nz
transmit(2001:470:fd50:20:662:73ff:fe5f:c06c)
receive(2001:470:fd50:20:662:73ff:fe5f:c06c)
transmit(2001:470:fd50:20:662:73ff:fe5f:c06c)
receive(2001:470:fd50:20:662:73ff:fe5f:c06c)
transmit(2001:470:fd50:20:662:73ff:fe5f:c06c)
receive(2001:470:fd50:20:662:73ff:fe5f:c06c)
transmit(2001:470:fd50:20:662:73ff:fe5f:c06c)
receive(2001:470:fd50:20:662:73ff:fe5f:c06c)
server 2001:470:fd50:20:662:73ff:fe5f:c06c, port 123
stratum 15, precision -25, leap 00, trust 000
refid [2001:470:fd50:20:662:73ff:fe5f:c06c], delay 0.03461, dispersion 0.00000
transmitted 4, in filter 4
reference time: 04000469.5e498c43 Mon, Feb 17 1902 2:39:53.368
originate timestamp: 0400049b.492c52e0 Mon, Feb 17 1902 2:40:43.285
transmit timestamp: eb8d782e.2f52008a Wed, Mar 26 2025 3:45:02.184
filter delay: 0.03714 0.03461 0.03526 0.03601
0.00000 0.00000 0.00000 0.00000
filter offset: 41016023 41016023 41016023 41016023
0.000000 0.000000 0.000000 0.000000
delay 0.03461, dispersion 0.00000
offset 410160237.095359
26 Mar 03:45:02 ntpdate[24378]: step time server 2001:470:fd50:20:662:73ff:fe5f:c06c offset 410160237.095359 sec
If ntpdate command is not available, run chronyd -QU 'server ntp2038.yuriko.co.nz iburst' instead.
[yuriko@i-004b276ed8c2b2733 ~]$ chronyd -QU 'server ntp2038.yuriko.co.nz iburst'
2026-02-02T01:40:33Z chronyd version 4.3 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +NTS +SECHASH +IPV6 +DEBUG)
2026-02-02T01:40:33Z Disabled control of system clock
2026-02-02T01:40:38Z System clock wrong by 378691199.979726 seconds (ignored)
2026-02-02T01:40:38Z chronyd exiting
You can set source for chronyd or ntpd to monitor offset. (it should be 4747days)
[root@trijn ~]# chronyc sources -v
210 Number of sources = 4
.-- Source mode '^' = server, '=' = peer, '#' = local clock.
/ .- Source state '*' = current synced, '+' = combined , '-' = not combined,
| / '?' = unreachable, 'x' = time may be in error, '~' = time too variable.
|| .- xxxx [ yyyy ] +/- zzzz
|| Reachability register (octal) -. | xxxx = adjusted offset,
|| Log2(Polling interval) --. | | yyyy = measured offset,
|| \ | | zzzz = estimated error.
|| | | \
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^+ 47.79.37.210 2 10 377 662 -97us[ -97us] +/- 2881us
^+ any.time.nl 2 10 377 667 -52us[ -31us] +/- 1313us
^* 2406:da14:10c4:9aa0:123:: 1 10 377 664 +183us[ +203us] +/- 1166us
^x cisco-ucs.home.yuriko.co> 15 6 377 16 -4747d[ -4747d] +/- 5684us