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To calculate the number of days in several date spans, fill in the following table. Every table row contains a span beginning date and span end date.
The calculator can process date period intersections differently.
- If the "Simultaneous events increase the total number of days" option is switched on - all the days in all date spans are added up despite possible span intersections.
- If the switch is off - the calculator counts all the period intersections only once.
The period end date is not included in the calculation. The calculator produces a detailed table and graph, which contain information on days counting and intersections.
We provide a list of wars in which Russia and its predecessors (Russian Empire, Soviet Russia, USSR) participated since the 19th-century beginning. An interesting fact is 34% of calendar time for the last two centuries, Russia was at war. The greatest contribution in this mark was made by The Russian Empire (46% calendar time spent at war). For one full century and small addition before replacing by Soviet Russia, The Russian Empire completed 14 wars, sometimes 3 wars were running simultaneously.