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"WWDPD." Fullformexpand.com, https://www.fullformexpand.com/wwdpd/winter-weekday-darkness-peak-demand. Accessed 23 Apr. 2026.
Fullformexpand.com, 2026. "WWDPD." Accessed April 23, 2026. https://www.fullformexpand.com/wwdpd/winter-weekday-darkness-peak-demand.
"WWDPD." (n.d.). Fullformexpand.com. Retrieved April 23, 2026, from https://www.fullformexpand.com/wwdpd/winter-weekday-darkness-peak-demand.
WWDPD. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/wwdpd/winter-weekday-darkness-peak-demand (Accessed: 23 April 2026).