I don't know,
DarkJoy... It seems like the situation warrants some more sympathy. One _could_ see it as: you went from having a job to having one (no change). He went from having one, to not having one at all (big change).
I can see how that would be a blow and would significantly impact his mood. If it's just been a couple days, as you said, he should be cut some slack. My empathetic side (which disappears from time to time) would be tell him that I'm sorry for what happened and that I'm going to give him space to sort things out... (which in a nice way excuses you from being around him during his bad moods).
I feel like how something like this is handled could have big impact on the direction of the relationship:
-it's fair for you to want to celebrate your new job
-it's fair for him to want to wallow for a couple days on a job loss (especially if he's had it for years)
-it's fair for you to want to celebrate
-it's fair for him to be really preoccupied right now
I could be wrong, since I haven't had a superrr long relationship yet, but logically all these things seem fair to me.
Maybe I'd tell him that when he gets his new job, and pronto...
, that we owe each other (ahem) a celebration, and see how that goes.