No, the charge is only that the OP was speeding, the law does not include different charges for different locations/times for an offense (provided the properly posted speed limit is the same). That is the offense that is being charged in the complaint/citation, speeding. The particular time and place on the ticket are supporting information to establish probable cause. The testimony at trial is what matters and errors in the time/place are only relevant as part of the totality of the case. Some information is weighted more heavily than others in the determination of guilt. If the officer got a car color/make/model wrong but the plate was correct and the DL information was correct, the errors do not automatically produce a not guilty verdict. If someone was charged with murder at 1PM and between being charged and the trial additional information came forward that the actual time was 2PM, does that make the original charge invalid? Or if there is an obvious typographical error about one detail, does that in validate the charge? No, all of the evidence about what/when/where would be presented at trial and the jury (or judge if a jury trial is waived) would decide where the truth lies. Since all that is needed to issue a ticket/arrest someone/ charge someone is probable cause, that cause would be dictated by the totality of the information presented. If one or a couple of details are incorrect, that does not in and of itself invalidate the probable cause. It can be used to the defendant's advantage at trial by demonstrating inconsistencies in the prosecution's case, but it is the totality of the evidence is what is important. The OP's signature on the citation indicates that at some time the officer stopped the OP, accused them of speeding and had them sign a statement that they would respond to the citation. That information overwhelms whether the officer checked the right box for AM or PM on the citation to make the citation valid.