"Come" was used in earlier English with future time expressions in utterances such as
--The young couple will be betrothed come December
--Come New Year's, we'll be in our new house in the highlands
None of my grammar references has any mention of this use of "come", but there is an entry for it in the
Concise Oxford English Dictionary, which states
'Come', the present conj. [sic], is used with a future date following as subject as in Fr. dix-huit ans vienne la Saint-Martin, viennent les Pâques, 'eighteen years old come Martinmas. --come Easter'; i.e. let Easter come, when Easter shall come.'
The verb form "come" is not indicative, it's a subjunctive, and is labeled "archaic and dialectal." The OED doesn't refer to any use other than with future time expressions.
The
Time Magazine writer seems to have taken liberties with the expression--using it for a present idea--in order to give an archaic flavor to the utterance.