Below provides the basic commands for configuring the date, time and NTP on your Juniper

Set the time

either

set date ntp

or

set date YYYYYMMDDHHMM

Set the name servers

set system name-server your.name.server.1
set system name-server your.name.server.2
commit

Configure the Time Zone

set system time-zone America/New_York

Configure NTP

set system ntp server 0.centos.pool.ntp.org prefer
set system ntp server 1.centos.pool.ntp.org
set system ntp server 2.centos.pool.ntp.org

Set the Time/Date

set date ntp 

Confirm

user@switch> show ntp status

status=c011 sync_alarm, sync_unspec, 1 event, event_restart,
version="ntpd 4.2.0-a Tue Dec 13 15:04:13 2016 (1)",
processor="octeon", system="JUNOS15.1X49-D70.3", leap=11, stratum=16,
precision=-18, rootdelay=0.000, rootdispersion=0.525, peer=0,
refid=INIT, reftime=00000000.00000000 Thu, Feb 7 2036 1:28:16.000,
poll=4, clock=e0491cc4.d5c7256d Fri, Mar 29 2019 18:37:56.835, state=0,
offset=0.000, frequency=0.000, jitter=0.004, stability=0.000

Reference

http://kb.juniper.net/InfoCenter/index?page=content&id=KB15756

SRX Gotcha

When running the command ‘run show ntp status’ you receive the following error.

root@srx100# run show ntp status
localhost: timed out, nothing received
***Request timed out

This issue arises when the firewall filter (that is applied to the loopback interface) denies the traffic. Further details can be found at the following link.