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CURLOPT_TIMEVALUE_LARGE - set time value for conditional #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMEVALUE_LARGE, curl_off_t val); Pass a curl_off_t val as parameter. This should be the time counted as seconds since 1 Jan 1970, and the time will be used in a condition as specified with CURLOPT_TIMECONDITION(3). The difference between this option and CURLOPT_TIMEVALUE(3) is the type of the argument. On systems where 'long' is only 32 bit wide, this option has to be used to set dates beyond the year 2038. 0 HTTP, FTP, RTSP, and FILE

CURL *curl = curl_easy_init();
if(curl) {
 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

 /* January 1, 2020 is 1577833200 */
 curl_easy_setopt(curl, CURLOPT_TIMEVALUE_LARGE, (curl_off_t)1577833200);

 /* If-Modified-Since the above time stamp */
 curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);

 /* Perform the request */
 curl_easy_perform(curl);
}

Added in 7.59.0. Returns CURLE_OK CURLOPT_TIMECONDITION "(3), " CURLOPT_TIMEVALUE_LARGE "(3), "