error on line 1 at column 2 starttag invalid element name xml code example

Example 1: padding a string with 0 in java

String.format("%05d", yournumber);
//%05 means length of 5
// 25 becomes 00025

Example 2: Error in charToDate(x) : character string is not in a standard unambiguous format

library(lubridate)
data$created_date1 <- mdy_hm(data$created_at)
data$created_date1 <- as.Date(data$created_date1)