Affinity Designer Workbook 50% off

[Deozaan]

I got an email from Affinity with a link that can be used to buy the Affinity Designer Workbook at a 50% discount which comes to $25 (+$5 shipping) in the USA.

https://store.serif.com/checkout/?code=des-wb-feb19&mc=WBFEB19E1

It says the offer is available for a limited time, but doesn't specify when it ends.

[Deozaan]

I just got another email reminder about this and it says the deal ends "Midnight on Sunday, 3 March" but doesn't specify which timezone.