For transactions requests, you should enter the
to parameters in ISO 8601 UTC format, i.e.
ISO8601 sets out an internationally agreed way to represent time & date. Find more info on ISO 8601 at this link.
For some providers, at certain times of year, they may return transactions from an incorrect date or time range, this is due to differences in the standards used for time & date between TrueLayer & provider e.g. at the start of BST transactions may be returned for a day before the requested time range, if that provider uses BST instead of ISO8601 UTC.