how long will homemade marinated olives last?

[sphil]

I'm doing hampers for Christmas presents and want to make chilli, thyme and orange marinated olives. MiL is coming over next week so I need to make hers and Sils this weekend. But will they last until Christmas? Am obviously doing them in sterilised jars and will put eat by date on label. Googling has given me results from 1 week to 2 months!!

I'm sure someone will come along that has done it before, but if you store them in olive oil in the jars, surely they'll be fine?

disclaimer - I know nothing about home crafts, just that I eat a lot of olives

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