No Dawn or Dusk in Scenario Book?

[Blackcloud6]

In 3rd edition and earlier, the turn chart's markings was the default but the rules didn't say anything. 4th edition added Section 8.11 to make this explicit.

Here is 8.11, it does not say when dawn or dusk is when the scenario specific rules don't say when dawn or dusk is:

8.11 From Dusk to DawnThe transition from night to day or vice versa presents a time of changing spotting range. Scenario specific rules will identify the time Day or Night occurs. Use the following spotting ranges in relation to those times.

• Dawn minus 60 minutes: spotting range 1 or 2 hexes (see below), night rules in effect.
  
• Dawn minus 45 minutes: spotting range 2 hexes, night rules in effect.
  
• Dawn minus 30 minutes: spotting range 4 hexes, no night rules.
  
• Dawn minus 15 minutes: spotting range 8 hexes, no night rules.
  
• Day: spotting range 12 hexes.
  
• Dusk minus 60 minutes: spotting range 12 hexes.
  
• Dusk minus 45 minutes: spotting range 8 hexes, no night rules.
  
• Dusk minus 30 minutes: spotting range 4 hexes, no night rules.
  
• Dusk minus 15 minutes: spotting range 2 hexes, night rules in effect.
  
• Night: spotting range 1 or 2 hexes (see below), night rules in effect.