Mikrotik

# NTP Client
# Detailed information
# Servers to use
# Using Winbox you go to:
# - System / SNTP Client
# - Check Enabled checkbox
# - Primary NTP Server: 0.pool.ntp.org
# - Secondary NTP Server: 1.pool.ntp.org
# Using Terminal, type:
/system ntp client
 set enabled=yes primary-ntp=104.194.8.227 secondary-ntp=50.205.244.114

# Confirm ntp server hostnames/ip addresses using the Servers to use link.