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Kusama time cheat sheet

Periods of common actions and attributes

NOTE: Kusama is 4x as fast as Polkadot will be, except for blocktimes where Polkadot will also have 6 second blocktimes.

  • Block: 6 seconds
  • Epoch: 1 hour (600 slots x 6 seconds)
  • Session: 1 hour (6 sessions per Era)
  • Era: 6 hours (3600 slots x 6 seconds)
Kusama Time Slots*
Block 6 seconds 1
Epoch 1 hour 600
Session 1 hour 600
Era 6 hours 3,600

*A maximum of one block per slot can be in a chain.


Democracy Time Slots Description
Voting period 7 days 604,800 How long the public can vote on a referendum.
Launch period 7 days 604,800 How long the public can select which proposal to hold a referendum on. i.e., Every week, the highest-weighted proposal will be selected to have a referendum
Enactment period 8 days 691,200 Time it takes for a successful referendum to be implemented on the network.
Council Time Slots Description
Term duration 1 day 14,400 The length of a council member's term until the next election round.
Voting period 1 day 14,400 The council's voting period for motions.
Technical committee Time Slots Description
Cool-off period 7 days 604,800 The time a veto from the technical committee lasts before the proposal can be submitted again.
Emergency voting period 3 hours 1,800 The voting period after the technical committee expedites voting.

Staking, Validating, and Nominating

Kusama Time Slots Description
Term duration 6 hours 3,600 The time for which a validator is in the set after being elected. Note, this duration can be shortened in the case that a validator misbehaves.
Nomination period 6 hours 3,600 Every 6 hours, a new validator set is elected according to Phragmen's method.
Bonding duration 7 days 604,800 How long until your funds will be transferrable after unbonding.
Slash defer duration 7 days 604,800 Prevents overslashing and validators "escaping" and getting their nominators slashed with no repercussions to themselves


Treasury Time Slots Description
Periods between spends 6 days 518,400 When the treasury can spend again after spending previously.