I feel unfortunate this emblem does not apply to December 8th as a whole. The Prometheus Lens flooding crucible was active during this whole day and everyone was using it. I know because i played after midnight into the AM of the 8th just not into the observed period. Why reward only a hyper specific window that doesn't fairly treat all players who experienced the very intent of the emblem in the same regard?
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It was based around when Xur offered it to everyone.