This year the Yajur Upakarma is on 11th  August and Gayatri japam is on 12th August 2022

You may make a note of the sankalpam details and print out tamil or sanskrit versions for easy reading. Browse down for tamil, sanskrit document links.

Preliminaries:

1.AchamanaM

achyutaaya namaH
anantaaya namaH
govindaaya namaH

Take little water on your right palm and swallow it uttering the above mantra(don't sip the water). Wash the palm with water, wipe the lips with the clean palm, wash the palm again

With right hand fingers as described below touch the various parts of the body.

keshavaaya namaH (thumb to touch right cheek)
naaraayaNaaya namaH (thumb to touch left cheek)
maadhavaaya namaH (ring finger to touch right eye)
govindaaya namaH (ring finger to touch left eye)
vishhNave namaH (index finger to touch right side nose)
madhusuudanaaya namaH (index finger to touch left side nose)
trivikramaaya namaH (little finger to touch right ear)
vaamanaaya namaH (little finger to touch left ear)
shriidharaaya namaH (middle finger to touch right shoulder)
hR^ishhiikeshaaya namaH (middle finger to touch left shoulder)
padmanaabhaaya namaH (four fingers to touch navel and the chest)
daamodaraaya namaH (four fingers to touch head)

2.praaNaayaama

oM bhuuH. oM bhuvaH. oM suvaH. oM mahaH.
oM janaH. oM tapaH. o{gm.h} satyam.h .
oM tatsaviturvareNyaM .
bhargodevasya dhiimahi.
dhiyo yo naH prachodayaat.h .
omaapo jyotiraso.amR^itaM brahma bhuurbhuvassuvarom.h ..

3.guru paraMparaa dyaanaM

asmad.h gurubhyo namaH
asmad.h parama gurubhyo namaH
asmad.h sarva gurubhyo namaH

shriimate aadivaNshaThakopa yatiindra mahaa deshikaaya namaH

shrImaan.h ve~NkaTa naathaaryaH kavitaarkika kesarI.
vedaantaachaarya varyo me sannidhattaaM sadaa hR^idi..

gurubhyas.h tad.h gurubhyashcha namo vaaka madhiimahe.
vR^iNiimahe cha tatraadyau daMpati jagataaM pati..

svasheShabhuutena mayaa sviiyaiH sarva parichchhadaiH.
vidhaatuM priitmaatmaanaM devaH prakramate svayam.h..

shuklaambaradharaM vishhNuM shashivarNaM chatur bhujat.hM .
prasanna vadanaM dhyaayet.hsarva vighnopashaantaye ..

yasya dvirada vaktraadyaaH paarishhadyaaH parashshataM.
vighnaM nighnanti satataM vishhvaksenaM tamaashraye ..

4.saN^kalpaM for Kamokarshit japam.

With the palms together in the saN^kalpa posture

asya shrii bhagavato mahaa puruShasya shrii viShNoH aaj~naa pravartamaanasya adya brahmaNaH dvitiiya paraardhe shrii
shveta varaaha kalpe vaivasvata manvantare kaliyuge prathama paade jambuudviipe bhaarata varShe bharata khaNDe shakaabde
meroH daxiNe paarshve asmin.h vartamaanaanaaM vyavahaarikaaNaaM prabhavaadiinaaM shaShTi saMvatsaraaNaaM madhye

This sankalpam is for Yajur veda upakarama on 3rd  August 2020

 Subhahrdh naama saMvatsare
DhakshiNaayane
  Greeshma  R^itau
 Karkataka  maase
shukla paxe
Chaturthyaam(until 10.22 AM)/pauramaasyaam shubhatithau
Guru vaasara
SharavaNa.. naxatra yuktaayaaM shrii viShNu yoga shrii viShNu karaNa shubha yoga shubha karaNa evaMguNa
visheShaNa vishiShTaayaaM asyaaM pauramaasyaam... shubhatithau shrii bhagavadaaj~nayaa shriiman.h naaraayaNa
priityarthaM taiShyaaM paurNamaasyaaM adhyaayotsarjana akaraNa praayashchittaarthaM aShTottara sahasra sa~Nkhyaa kaamo.akaarShit.h manyura kaarShit.h mahaa mantra japaM kariShye.

5.saatvikatyaagaM

With the palms together in praNaama (Namaste) posture

saatvikatyaagaM

oM bhagavaaneva svaniyaamya svaruupasthiti pravR^itta svasheShataika rasena anena aatmanaa kartraa svakiiyaishcha
upakaraNaiH svaaraadhanaika prayojanaaya parama puruShaH sarva sheShi shriyaH patiH svasheSha bhuutaM idaM
kaamo.akaarShit.h manyura kaarShit.h mahaa mantra japaM karma svasmai svapriitaye svayameva kaarayati..

Do kaamo.akaarShit.h manyura kaarShit.h japam 1008 times as per sankalpam

aachamanam.h 2 times

praaNaayaamam.h

6.yaj~nopaviita dhaaraNaM

asya shrii bhagavato mahaa puruShasya shrii viShNoH aaj~naa pravartamaanasya adya brahmaNaH dvitiiya paraardhe shrii
shveta varaaha kalpe vaivasvata manvantare kaliyuge prathama paade jambuudviipe bhaarata varShe bharata khaNDe shakaabde meroH daxiNe paarshve asmin.h vartamaanaanaaM vyavahaarikaaNaaM prabhavaadiinaaM shaShTi saMvatsaraaNaaM madhye

..................... naama saMvatsare
..................... ayane
..................... R^itau
..................... maase
..................... paxe
..................... shubhatithau
..................... vaasara
..................... naxatra yuktaayaaM shrii viShNu yoga shrii viShNu karaNa shubha yoga shubha karaNa evaMguNa
visheShaNa vishiShTaayaaM asyaaM .......................... shubhatithau shrii bhagavadaaj~nayaa shriiman.h naaraayaNa
priityarthaM shraavaNyaaM paurNamaasyaaM adhyaayopaa karma kariShye.

tada~NgaM kaaNDa R^iShi tarpaNaM kariShye.
tada~NgaM yaj~nopaviita dhaaraNaM kariShye.
tada~NgaM kaaverii snaanamaham.h kariShye.
(bachelors only) tada~Ngatayaa mau~njyajina daNDa dhaaraNaani cha kariShye
 

yaj~nopaviita dhaaraNa mahaa mantrasya brahmaa R^iShiH Touch the Head
triShThup.h chhandaH Touch the Nose
trayii vidyaa devataaH Touch the heart

yaj~nopaviita dhaaraNe viniyogaH

Hold yoj~nopaviitaM as shown in the picture (Image courtesy:Sri.TRS Chary,Canada)below. Put in as shown by the arrows while reciting the following mantras

yaj~nopaviitaM paramaM pavitraM prajaa pateH yat.h sahajaM purastaat.h.
aayuShyaM agriyaM pratimu~ncha shubhraM yaj~nopaviitaM balamastu tejaH..

Do aachamanaM and praNaayaamaM

The following session is only for grahastaas

adya puurvokta evaMguNa visheShaNa vishiShTaayaaM asyaaM ...................... shubhatithau shrautasmaarta vihita nitya
karmaanuShThana yogyataa sidhdiyarthaM gaarhasthayaarthaM dvitiiya yaj~nopaviita dhaaraNaM kariShye.

punaH yaj~nopaviita dhaaraNaM

yaj~nopaviita dhaaraNa mahaa mantrasya brahmaa R^iShiH Touch the Head
triShThup.h chhandaH Touch the Nose
trayii vidyaa devataaH Touch the heart

yaj~nopaviita dhaaraNe viniyogaH

Hold yoj~nopaviitaM as shown in the picture below. Put in as shown by the arrows while reciting the following mantras

yaj~nopaviitaM paramaM pavitraM prajaa pateH yat.h sahajaM purastaat.h.
aayuShyaM agriyaM pratimu~ncha shubhraM yaj~nopaviitaM balamastu tejaH..

Do aachamanaM and praNaayaamaM

7.Removing old yaj~nopaviitam. This section is common to all

Recite

upaviitaM chhinnatantuM jiirNaM kashmala duuShitam.h.
visR^ijaami hare brahman.h varcho diirghaayurastu me..

Remove your old yaj~nopaviitaM.

Do aachamanaM

The following procedure is only for bachelors for wearing maunji,deer skin and palasa tanda

Recite the following mantras and wear "maunji" on your waist.

idaM duruktaat.h paribaadhamaanaa sharma varuuthaM punatii na aagaat.h.
praaNaa paanaabhyaaM balamaabharantii priyaa devaanaaM subhagaa mekhaleyam.h..

R^itasya goptrii tapasaH parasvii ghnatii raxaH sahamaanaa araatiiH.
saa naH samantamanu pariihi bhadrayaa bhartaaraste mekhale maa riShaama..

Recite the following mantras and wear deer skin on your yaj~nopaviitam

mitrasya chaxurdharuNaM baliiyaH tejo yashasvi sthaviraM samiddham.h.
anaahanasyaM vasanam.h jariShNu pariidaM vaajyajinaM dadhe.aham.h..

Recite the following mantras and hold the palasa tanda on your hand

sushravaH sushravasaM maa kuru yathaa tvaM sushravaH sushravaa asi.
evamahaM sushravaH sushravaa bhuuyaasaM.
yathaa tvaM sushravo devaanaaM nidhi gop.asi.
evamahaM braahmaNaanaaM nidhi gopo bhuuyaasaM.

The following procedure is common for all

kaaNDa R^iShi tarpaNaM

sa~NkalpaM
shrii bhagavadaaj~nayaa shriiman.h naaraayaNa priityarthaM deva R^iShi tarpaNaM kariShye.

Put the yaj~noopaviitaM like a garland, and hold it with two thumb fingers.Take little seasame seeds(eL) and akshata(uncooked rice) and pour little water on the hand and do like argyam

R^iShi tiirthaM (like argyam)

prajaapatiM kaaNDa R^iShiM tarpayaami
somaM kaaNDa R^iShiM tarpayaami
agniM kaaNDa R^iShiM tarpayaami
vishvaan.h devaan.h kaaNDa R^iShiM tarpayaami
saaMhitiir.h devataa kaaNDa R^iShiM tarpayaami
yaaj~niir.h devataa kaaNDa R^iShiM tarpayaami
vaaruNiir.h devataa kaaNDa R^iShiM tarpayaami

brahma tiirthaM (thru the underside of the palms)

brahmaaNaM svayaMbhuvaM tarpayaami

Thru little fingers

sedasaspatiM tarpayaami

kaayenavaachaa manasendriyairvaa buddhyaa.a.atmanaa vaa prakR^iteH svabhaavaat.h |
karomi yadyatsakalaM parasmai shriimannaaraayaNaayeti samarpayaami ||

sarvaM shriikR^ishhNaarpaNamastu
iti upaakarma

Now atleast recite purusha suktam and do saashtaanga namaskaaram to perumal, parents and elders

Reference:Sri Vaishnava Dinacharya. All the errors are mine due to his poor understanding.Please send your comments and typos etc to rmvenkat@yahoo.com