Powerplay Question about Powerplay Modules.

I recently pledged to a power for a module, but I'm uncertain when it'll become available. I pledged a few days before a weekly tick, and it shows 5 days of pledge duration.

My question is, will the module unlock at the 4th tick, the 5th tick or on day 28? (I know I need to reach rank 3 to get it)
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