There are 2 or more NTP servers on our local network.
It is easy-peasy to set a node to use one of these time servers.
Hours may vary between EST EDST UTC but the minutes should be accurate.
Here are the 
MM:SS   Node_Names:
00:24   N8NQH-to-MVHS
03:08 E w8go-Ns2-CMH-S
06:44 U W8BI-DARA-Omni
06:48 U KE8MVM-DARA-TO-XWARN
07:47   NC8Q-Centerville-Miamisburg Ooopps!
07:47 U KE8MVM-LHG-MVHS-XeniaNorth
08:18 E K9PSL-1-MTRB
08:20   KE8MVM-MVHS-Ferry
08:21   KC8SLY-MontgomeryFarms
08:23 E N8JJ-Services
08:24   KD8TNV-NX1
08:25 E N8JJ-NSM9-1
08:26   NC8Q-hAP
08:28   KI7ODK-LHG5
08:28   KI7ODK-LHG5-DARA
08:29   KX8U-002
08:29   KX8U-Monroe2Dayton
08:30   NC8Q-Centerville-HuberHeights
08:30   NC8Q-Centerville-Kettering
08:31   NC8Q-AssyHall-to-Building-1
08:31   NC8Q-Centerville-Bellbrook
08:31 U N2MH-AR-MVMA
08:33   N8WQ-1
08:33   NC8Q-Dayton-Mall-North
08:33   NC8Q-HuberHeights-Centerville
08:35   NC8Q-Dayton-Mall-ESE
08:35   NC8Q-Kettering-Centerville
08:36   N8VSI-SHACK
08:36   W8LRJ-hAP
08:36   W8LRJ-hAP-BARC
08:37   NC8Q-Hamvention-to-XeniaN
08:37   NC8Q-HuberHeights-Springfield
08:37   NC8Q-Miamisburg-Monroe
08:40   NC8Q-Services
08:40   NC8Q-XeniaN-to-Hamvention
08:42   NC8Q-Services1
08:45 U NK8B-hAP
08:45   W8LRJ-BARC-FieldDay
08:45   W8LRJ-BBush-MVHS
08:47   W8LRJ-MVHS-Beavercreek
08:48 E w8go-Hub-hAP
08:55 E w8sbl-airhp
08:55   W9AMA-QTH-hAP
08:57 U WA8APB-AGM5-To-N8NQH
08:57   WF8B-QTH-hAP
08:58 U WA8APB-LHG-To-XeniaNorth
08:59 U WA8APB-Services
09:02 E WX8A-QTH-hAP
10:07 U AB8XA-NSM5
15:08 U KE8MVM-LHG-XeniaNorth-MVHS
15:34 U W8BI-DARA-Services
19:10 U AB8XA-NSM9
21:08 U AE8I-3-TippCity
26:45 E wx8wil-Ns2--NE
29:56   NC8Q-Miamisburg-Centerville Ooopps!
31:44 U KE8MVM-XWARN-To-DARA
38:44 U WA8APB-LHG-At-XeniaNorth-to-APB
40:02 E WX8A-M2-QTH
44:43 U W8XRN-XWARN-Omni
46:45   N8NQH-BigBlue
52:11   N8NQH-to-WA8APB