long ONE_DAY_IN_SECONDS = 60 * 60 * 24;

DateTimeFormatter dateParser = DateTimeFormatter
    .ofPattern("yyyy-MM-dd'T'HH:mm:ss'Z'").withZone(ZoneId.of("UTC"));
long now = ZonedDateTime.now().toEpochSecond();

Server server = new Server("https://horizon-testnet.stellar.org");
TransactionsRequestBuilder txnRequests = server.transactions().limit(200)
    .order(RequestBuilder.Order.DESC);

List<TransactionResponse> responses = new ArrayList<>();
Page<TransactionResponse> page = txnRequests.execute();

boolean limitHit = false;
while (!limitHit) {
    page.getRecords().removeIf(txn -> {
        ZonedDateTime txnDateTime =
            ZonedDateTime.parse(txn.getCreatedAt(), dateParser);
        return now - txnDateTime.toEpochSecond() > ONE_DAY_IN_SECONDS;
    });

    if (page.getRecords().isEmpty()) {
        limitHit = true;
    } else {
        responses.addAll(page.getRecords());
        String pagingToken = responses.get(responses.size() - 1).getPagingToken();
        page = server.transactions().limit(200).order(RequestBuilder.Order.DESC)
            .cursor(pagingToken).execute();
    }
}

responses.forEach(txn -> {
    System.out.println("txn = " + txn.getHash());
});