The next change is on next Tuesday/Wednesday. you can add/subtract 14 days either side to get future/past dates.
I know that way , but if there exists some hours precision list , Id like to know. If not Ill do exactly what you said.
Or knowing that the exact time between each activity change also is helpful. (ex: always 14 days 6 hours etc)
Edit2: It seems 1,210,000 seconds and is equal 14 days 6 minutes and 40 seconds.
Edit: I didnt see the doc sheet. Very glad to know it , thanks a lot