The question is confusing. DA 1594 is the "Daily Staff Journal or Duty Officer's Log." Note the term "Daily" in the title. So, 1594 must be completed and submitted at the close of business or at the end of the DO's shift.
The time frame for completing the 1594 is the same for a Platoon Section Chief, a Casualty Assistance Officer, the Unit CO, the Brigade Command General, or the Secretary of the Army.
Close of business (24 hour period, one per), or end of duty shift.
See AR (Army Regulation) 220-15--linked below.
Without qualification a time period is any amount of time, to define the period, additional information is required, such as 'a time period of 20 years'
They closed because the plague had broken out in London at that time. They reopened late in 1594.
the period.
"The Taming of the Shrew" by William Shakespeare was written in the late 16th century, around 1590-1594.
period.
The telescope was invented in Germany.
sediment and time.
The Period
It's period of half of decay.
a serious amount of drinking required over a period of time without sleep
No time period is required.
The time required for a single vibration (back and forth motion).