[R] Time when object was created

[Rubén Roa-Ureta]

Dear ComRades,
Last night I left an Intel Core Duo Windows Vista system running an 
extensive mixed glm with lmer. This morning I found that R-lmer had 
finished the job successfully. I would like to know at what time the 
object containing the results (call it lme_1) was finished. I guess 
there is some simple function that when applied to the object would give 
me the time stamp?
Thanks
Rubén