Do Marines have 30 days after promotion to have new chevrons sewn onto their uniforms?

I can't understand that anyone would not want their new rank on the uniform they are wearing the day that a promotion is effective.

I am not sure what a reasonable time would be for all uniforms displayed to ahve the new rank.

If a uniform is not worn nor displayed why would we care?

Why would someone want to wait 30 days before getting their new chevrons and/or rockers sewn on their uniforms?

I actually have a funny story to add to this discussion, so I had my Class A jacket at Boomerangs off of honeycut at Bragg to have the rank changed from PFC to SPC, the shop discovered that during the last switch from PV2 to PFC, someone had cut a hole in my sleeve, which could be covered by the PFC rank but not the SPC. Now, my dumbass private self had taken it to the on post alterations shop the first time, they of course gave me the good o'le middle finger and said tough luck. So needless to say, I went out and bought a used jacket, which is the one I currently use. But the hole can be covered by SGT rank, so I went ahead and had it sewn on overtop the hole nearly two years in advance of when I would pick up. It's been chillin in my closet ever since, hopefully I'll be able to wear it here in a month or so.

I sugeest that if you are so lazy to wait 30 days, you might as well give it back. Seriously the next time we had a class A formation and my lil darlings didn't have their new rank on- they and their NCO chain would be in my office for awhile.

I was promoted to Sergeant (E-5) on June 1st, but did not modify any of my uniforms until February of the following year. Of course... I was in 'Nam on June 1st of 1966, and didn't arrive back stateside until the following February. Then - I RUSHED to have the new rank installed while on leave. I was darned proud of my new status!

I went thru rank pretty fast, then one day top told me that I might have to get inspected along with my troops, ( now understand I am a 3rd echelon Mechanic we never wore uniforms) we did everything in utilities, so as I am gathering every thing up to make my locker inspection ready I hear this laughter right behind me it was the gunner that wanted to know something about 5 ton engines he asked me how long I have been a Sgt and I said about a year sir then he said dont you think it is about time you removed those PFC stripes and put on SGT stripes.

Not sure about the other services, but that's why we were issued a sewing kit.

Sgt (Join to see) OK, I am not and never have been a Marine... But, why would you wait?

I think what you will find is it is an informal norm that will ebb and flow based on the leaders in that specific unit.
It may be tolerated in one unit and that same Marine transfers to another, gets promoted and chewed out when he comes back from post promotion lunch not wearing the sewed on "current" rank

I believe the 30-day grace period is for those that have been frocked.
As far as I remember, you should have 5 sets of your service uniform. So having a few of them ready for your promotion shouldn't be an issue. And even if you are involved in a locker inspection, whom ever is performing the inspection should know that you are about to gain rank and I doubt would have issue with the eagerness of you having the proper rank the moment you are pinned.