A date and time library based on the C++11/14/17 <chrono> header

Timewarrior - Commandline Time Tracking and Reporting

ezTime — pronounced "Easy Time" — is a very easy to use Arduino time and date library that provides NTP network time lookups, extensive timezone support, formatted time and date strings, user events, millisecond precision and more.

Arduino library to facilitate time zone conversions and automatic daylight saving (summer) time adjustments.

An Arduino library for setting and retrieving internal RTC time on ESP32 boards

LoraWAN serialization/deserialization library for The Things Network

High accuracy NTP library for ESP32 and ESP8266

⏱️ Single-header C++11 RDTSCP clock and timing utilities released into the public domain.

Arduino lib for HCSR04 ultrasonic sensor

NTP library for Arduino framework

DS3231 Real Time Clock Library

Efficient Updating of Date-Times

The C++17 reference implementation for a new Client/Server-based approach to IEEE1588 (Precision Time Protocol, PTP)

Library for NTPClient to connect to an NTP time-server. Get time from a NTP time-server and keep it in sync. For ESP8266/ESP32, nRF52, SAMD21/SAMD51, STM32F/L/H/G/WB/MP1, Teensy, etc. besides AVR, using ESP WiFi, WiFiNINA, Ethernet W5x00, ENC28J60, LAN8742A, ESP8266/ESP32 AT-command WiFi.

C++ port of Python datetime

Physical units, time, reference frames, environment modeling.

DS3213 high precision RTC (Real Time Clock) library for Arduino

Erriez 3-wire DS1302 Real Time Clock library for Arduino

Desamber time Arduino corporealization

Fully Asynchronous UDP Library for WT32_ETH01 (ESP32 + LAN8720). The library is easy to use and includes support for Unicast, Broadcast and Multicast environments.