Last day at X could have been 12/31/2004, last day at Y could have been 1/1/2009, first day at Z could have been 12/31/2009, but no 'suddenly suspicious gap' shows?
This is what I do. No one has ever asked me to clarify start and end dates.
That said, I'll never just up and quit a job now. Did it once, and those were some of the most stressful months of my life. No matter how crappy a job is, it doesn't compare to watching your hard-earned savings decline and facing the real, terrifying possibility that you won't make rent/mortgage payments.
Corp X: 1999-2004 Corp Y: 2005-2009 Corp Z: 2009-2013
Last day at X could have been 12/31/2004, last day at Y could have been 1/1/2009, first day at Z could have been 12/31/2009, but no 'suddenly suspicious gap' shows?